> What concrete information has been revealed that implicates Facebook in illegal behavior?
I'll leave it up to the legal system to decide what FB has done that's currently illegal. However, you don't just blow the whistle when you think laws are being broken. Sometimes you do it to start a discussion that can change the laws.
It's clear from the Facebook Files stories and documents that FB has known about the effects of their product on consumers (especially kids) and 1. lied to the public 2. lied to lawmakers 3. didn't change the product in ways that positively impacted kids.
That's obviously messed up and is not (afaik, ianal) covered under current US laws. I do strongly believe that it should. Platforms have responsibility, and S230 entirely takes the responsibility away from them.