https://www.techdirt.com/2023/07/24/more-suicide-resource-orgs-found-to-be-monetizing-sensitive-user-data/ Ugh, the *suicide resource sites* really shouldn't be sharing sensitive data like this with Facebook.
"In some cases, filling out contact forms on the sites transmitted hashed but easily unscrambled names and email addresses to Facebook."
Very intrusive.
"After publication, Maca Ferguson, a spokesperson for Volunteers of America Western Washington, said the pixel was used for fundraising efforts"
Some of these deliberately added the pixel (although, it's unclear whether they knew how much data it would collect) for unrelated purposes.
"Pellerin said they had removed the code, which they attributed to a plug-in on their website."
Others appear to have been hit by supply chain issues like this where a vendor casually threw the pixel in without their knowledge (although, likely not knowing this would happen).
When someone says that "Facebook is tracking you", you might imagine someone tracking the site which you visit, or more extremely, the page you're visiting.
You're not exactly expecting Facebook to be slurping the data out of every form on the page with a script like some sort of malware trying to steal your identity.