A Vibe-Coded Cookie Banner Isn't a Compliance Program

A pattern of note has taken shape: a founder works out how a cookie banner functions, builds one with an AI coding assistant in an evening, and cancels their consent management platform (CMP) subscription. 

In most cases, the banner performs as intended. The banner renders, a script logs the choice, and the site feels lighter without a third-party embed slowing it down. None of that is in dispute. What's worth examining is what "working" actually means here, and for a U.S.-based site, that's a narrower claim than it looks.

The GDPR Instinct Doesn't Cover U.S. Law

A homemade banner built around principles like a visible option to decline consent, a persistent record of consent, and recognition of a browser-level opt-out signal is, on its face, good practice. 

Those are largely GDPR concepts, though, and the GDPR and U.S. privacy laws don't share a legal foundation. Trying to satisfy both with one opt-in-flavored build tends to leave U.S.-specific requirements only partly covered.

U.S. privacy law is built primarily around notice and the right to opt out, not around obtaining consent before data collection starts. Over 20 states have now enacted their own comprehensive consumer privacy laws, each defining sensitive data, opt-out signal recognition, and cure periods somewhat differently. 

Additionally, regulatory enforcement in the U.S. is ramping up — increasingly across state lines — and auditing is automated and at scale, so an investigation for an alleged privacy violation doesn’t necessarily require a reported complaint. 

Now, other regulatory concerns, like the recent wave of pre-litigation letters related to the California Invasion of Privacy Act (CIPA), do require more than just notice and opt-out options, but we’ll get to that.

Opt-Out Signals Aren't One-Size-Fits-All

A single "recognize Global Privacy Control" rule is a reasonable start. But which signals is a site required to honor? What counts as a sale or sharing of data? And how quickly does an opt-out request have to take effect? It all varies by state. A build tuned to one state's requirements can quietly underserve visitors from another. 

But privacy law typically protects a given state’s consumers — your website’s visitors. Companies have to comply with laws that are relevant where their visitors are located. It doesn’t matter where your company is headquartered. And online, your website visitors can come from anywhere, rapidly scaling regulatory complexity.

CIPA Doesn't Care How the Banner Looks

For a U.S. audience, the more immediate exposure often has nothing to do with cookie banners at all. The California Invasion of Privacy Act (CIPA) is a 1967 wiretapping statute that plaintiffs' firms have repurposed to argue that ordinary website tools such as analytics scripts, chat widgets, and search bars intercept visitor communications without authorization. 

Claim volume under this theory has climbed sharply, and a small number of firms now send a high volume of demand letters using largely templated language.

CIPA permits statutory damages of USD 5,000 per violation, or three times actual damages, whichever is greater, and a plaintiff doesn't need to show real financial harm to bring a claim. 

Multiplied across a site's visitor count, that math adds up quickly. This is precisely why the letters keep coming, even though these plaintiffs are generally looking for settlements rather than a trip to court, which is much slower and more expensive for everyone, and the outcome is far less certain.

Here's the part that matters most for anyone who just built their own consent flow: Being CCPA-compliant does not protect a business from a CIPA claim. They're separate statutes built on separate legal theories, and a consent banner, however well built, doesn't automatically resolve either one. 

What tends to actually matter in these disputes is whether tracking scripts are blocked until a visitor makes a choice, whether rejecting consent changes what fires, and whether there's a defensible record of what happened. A banner that looks right in the browser doesn't answer any of those questions on its own.

There is a legislative wrinkle worth knowing about. SB 690, a bill that would curb some CIPA litigation, cleared a California Assembly committee on July 1, 2026, but only in a narrowed form.

It would eliminate the private right of action tied to the pen-register and trap-and-trace provisions (CIPA §§ 638.50–638.51). If it eventually passes both chambers and is signed by the Governor, it would apply retroactively to pending § 638.51 claims filed within the two years before the bill's operative date. 

The wiretapping and eavesdropping claims under §§ 631 and 632, the theories behind most existing demand letters, aren't touched by the current draft at all. 

As of mid-July, SB 690 hasn't passed the full legislature, and the deadline for this session is August 31, 2026. Nothing here has changed the underlying exposure yet, and a self-built banner isn't positioned to track whether or when it does.

A Consent Log Isn't a Compliance Record

A cookie banner asks a visitor a yes-or-no question and stores the answer somewhere. A compliance-grade consent record does more than that, and that “more” is increasingly legally required. 

In terms of evolving legal requirements for both regulatory compliance and for litigation, a consent record typically needs:

• A timestamp
• The visitor's jurisdiction
• A specific account of what was consented to (with any changes over time)
• A format that can be handed to a regulator or opposing counsel without additional explanation

A database table that stores consent = true isn't built for that job, even when it's technically well engineered.

The other piece that's easy to underestimate is upkeep. Trackers get added, swapped, and updated as a site changes, sometimes by a different person or team than the one who built the banner. Business operations and marketing activities change. And as we’ve hopefully already made clear, regulatory requirements evolve.

A one-time build reflects the site as it existed the day it shipped. Regulatory requirements, browser behavior, and the site's own tracking stack keep moving after that. Even companies with dedicated teams struggle to maintain a consent solution manually. For a one-person outfit, that resource drain is considerably greater.

What This Means If You Already Vibe-Coded Your Own Consent Banner

None of this is a knock on the skill it takes to build a working banner from scratch in an evening. It's a reasonable, low-cost solution to a version of the problem that's easier to see than the version regulators and plaintiffs' firms are actually looking at. If a self-built banner is already live, here’s what’s worth checking:

1. Are scripts actually blocked before a visitor makes a choice, or just hidden behind a UI?
2. Does rejecting consent change what fires, or only what's displayed?
3. Is there a record of consent choice that would hold up if a regulator or plaintiff's firm asked for it?
4. Is the build accounting for state-specific opt-out signals (e.g., GPC) and notice requirements, not just a GDPR-style consent flow?

Cookiebot™ CMP is built to handle each of those points as a managed, continuously updated service. And it typically takes less time to set up than the evening it takes to vibe-code a banner from scratch.

• Automated scanner for script detection and blocking ahead of consent, backed by a cookie and tracker repository of more than 13,000 entries.
• Detection tuned to catch more of what's actually running on a site, up to 63 percent more data processing services and trackers than other solutions, per Cookiebot's own testing.
• Audit-ready consent records with jurisdiction and timestamp data.
• Hands-off maintenance that adapts automatically to changes in a site's tracking infrastructure, without manual upkeep on your part.
• Signal handling built for both GDPR and U.S. state frameworks.

It won't make every compliance question disappear (no legitimate tool can promise that), but it's designed to keep pace with a global privacy landscape that a one-time build isn't set up to track on its own.

Cookiebot does not provide legal advice. This article is for informational purposes only; businesses evaluating their compliance exposure should consult qualified legal counsel.