I think it can work when there's a very clear threat that needs to be addressed urgently. I agree with some of what Jennifer said, though. Who is going to do the policing? That's a big job. Right now, social media platforms use algorithms, and this is a very human-dimension thing. There would be major resources required to make this happen, but we've seen that it can be done.
On May 16th, 2019. See this statement in context.