So social media is like the tobacco industry? And what weas users knowingly, purposely share online should be regulated? And by which government? Companies like Facebook are global.
Again, the problem is not sharing. The problem is that they knowingly manipulate the sharing. How they do that is their problem.
I have no idea how to go about enforcing this. But it's impossible for me to look at it and say "just let it run it's natural course".
Regarding what should be regulated, I’d say that assisting genocide should be blocked for a start.