V EFF.org:
Acc to EFF 'Meta’s tracking pixel, found on 30% of the world’s most popular websites, monitors people’s behavior across the web and can expose sensitive information, including financial and mental health data. A 2022 investigation by The Markup found that a third of the top U.S. hospitals had sent sensitive patient information to Meta through its tracking pixel.'
https://www.eff.org/deeplinks/2025/01/mad-meta-dont-let-them-collect-and-monetize-your-personal-data
Google's #tracking pixels aren't any better either. I always try to convince my clients to avoid using #Google #analytics.