If FB is going to use the data, then it should have the responsibility to check whether they can legally use it. Having their supplier say "It's not sensitive health data, bro, and if it is, it's consented. Trust us" should not be enough.

To use an extreme example, if someone posts CSAM through Facebook and says "It's not CSAM, trust me bro" and Facebook publishes it, then both the poster and Facebook have done wrong and should be in trouble.

>To use an extreme example, if someone posts CSAM through Facebook and says "It's not CSAM, trust me bro" and Facebook publishes it, then both the poster and Facebook have done wrong and should be in trouble.

AFAIK that's only because of mandatory scanning laws for CSAM, which were only enacted recently. There's no such obligations for other sensitive data.