I don't know what Congress expected to accomplish by doing this again. Its just another dog and pony show and then nothing happens after that.
I agree that social media seems to bring out the worst in some people. It always has. They become FB stars or online bullies or social justice warriors - its all no good. The pedophiles and other creeps out there have a perfect environment because they can hide or blend in.
FB does scan conversations for keywords, but it doesn't seem to understand the context of the conversation. My one nephew is a FB star and had used the phrase "I'd have to kill you" in one of his posts. He was just joking with a friend, but he got suspended for a month because of it.
Maybe AI would improve on keyword searches by considering context, but I don't know if its capable of that.
An internet ID wouldn't make a difference. Everyone already has an IP address and an ISP. If someone is an abuser, you can go to the ISP and they will turn over their identity. You may have to get a subpoena to do it, but they have that information.
One failing of FB is their FB Live. A lot of sickos out there like to broadcast their various crimes, including murder, real time. I think they should get rid of that if they can't police it.
"I suspect it will fall down to AI plus humans who snoop on the most juicy conversations that get flagged."
There isn't another way to control social media. Someone has to snoop.