[nothis]

As I understand it, if you're a huge company, you want ToS that ban an obvious, easily enforceable line before anything illegal is said because enforcing just the very edge of legality causes some fuzziness that will likely end in court. Basically what Elon isn't doing with Twitter.

[enkid]

There are always going to be edge cases that only expensive years of litigation will allow determining of legality. If you have to block everything illegal and allow everything legal, every single one of these edge cases will require litigation. It's an absolute nightmare for a social media company.