Seattle Children’s Hospital has landed a powerful ally in its long running battle over website tracking. The Interactive Advertising Bureau has filed an amicus brief at the Washington Supreme Court in a case that asks whether routine browser to server activity, including Meta’s Pixel code, can be treated as an unlawful interception under a 1967 state wiretapping statute. If the plaintiffs prevail, ordinary ad measurement, site analytics and basic troubleshooting could suddenly face new civil and criminal risk.
IAB Says Broad Reading Could Put Ad Measurement on the Line
The IAB’s brief, filed through Orrick, argues that treating ordinary HTTP request and response exchanges as "private communications" would upend how websites log clicks, measure ad performance and diagnose technical problems. The filing warns that a consent requirement for every packet crossing the internet would be unworkable and would "threaten ad measurement and basic website operations," a concern echoed in industry coverage. As reported by PPC Land, the brief was lodged on April 10, 2026.
The Procedural Backdrop: Pixel, a Dismissal and Supreme Court Review
The lawsuit dates back to October 2023, when three plaintiffs alleged that Seattle Children’s had deployed Meta’s Pixel on seattlechildrens.org and that the code captured their searches and clicks without proper consent, as reflected in the appellate record. The Washington Court of Appeals later affirmed the trial court’s dismissal in an unpublished opinion on August 18, 2025, holding that the plaintiffs’ click and search navigation did not fit the statute’s protected communication framework. The Washington Supreme Court accepted review on January 8, 2026 and lists the case as docket no. 1045905 on the court’s public docket.
Why Washington’s New Ad Tax and Rules Loom Over This Fight
Washington has already been reshaping the rules of the road for digital advertising. The state reclassified many advertising services as retail sales effective October 1, 2025, and the Department of Revenue issued interim guidance to put that change into practice. That same policy activism makes Washington an especially consequential venue for a privacy law ruling that could affect how ad spend and measurement work for Seattle publishers and nonprofits. At the same time, the ad ecosystem has been building technical accountability tools, including the IAB Tech Lab’s Accountability Platform, to standardize how consent and measurement signals are logged and audited.
Europe’s Courts Take Tougher Line on Pixel Tracking
Courts in Europe have already started ordering damages tied to third party tracking. In early 2026, German appellate panels issued relief in cases involving Meta’s Business Tools, with the Thuringia higher regional court (OLG Jena) awarding €3,000 in one decision. Those rulings are grounded in the GDPR and European data protection rules rather than a wiretapping statute, but they highlight growing judicial skepticism about nonconsensual tracking. Reporting on the German decisions underscores the global friction between tracking technology and privacy law.
Legal Stakes Under Washington Law
Under Washington law, it is unlawful to intercept or record certain “private communication[s]” without consent, and violations can carry civil and criminal penalties under that chapter. The IAB brief warns that a broad interpretation could sweep far beyond person to person calls and reach automated traffic between browsers and servers. The statutory text, together with the state’s appellate opinions, will frame how the Supreme Court decides whether automated browser server exchanges fall within the statute’s prohibition. Observers are watching both the court’s precedents and the precise statutory wording closely.
The next development will be procedural. The Washington Supreme Court must determine whether to schedule oral argument and ultimately whether to adopt the Court of Appeals’ narrower reading or embrace a broader view that could invite a wave of litigation and new compliance costs for publishers, hospitals and other Seattle area organizations that rely on analytics and ad measurement on their sites. For now, local newsrooms and nonprofit web teams have good reason to keep an eye on docket no. 1045905 as the case moves forward.
