A lot of the criticism is based on the concept that it won't be technically watertight. But the key is that it doesn't have to be watertight to work. Social media is all about network effects. Once most kids are on there, everyone has to be on there. If you knock the percentage down far enough, you break the network effect to the point where those who don't want to don't feel pressured to. If that is all it does, it's a benefit.

My concerns about this are that it will lead to

(a) normalising people uploading identification documents and hence lead to people becoming victims of scams. This won't be just kids - scammers will be challenging all kinds of people including vulnerable elderly people saying "this is why we need your id". People are going to lose their entire life savings because of this law.

(b) a small fraction of kids branching off into fringe networks that are off the radar and will take them to very dark places very quickly.

Because it's politically unattractive, I don't think enough attention has been given to the harms that will flow from these laws.