This is eminently sensible, should happen everywhere.
It almost always doesn't, because the big guys have lobbyists and the small guys don't.
The big guys would rather not have to comply with these rules, but typically their take is, well, if we're going to have to anyway, let's at least make it an opportunity to drive out some of the scrappy competition and claim the whole pie for ourselves.
It is not, however calls for racist violence are less dangerous when they're posted on a niche forum with 20 daily active users than when they're posted on Twitter.
It almost always doesn't, because the big guys have lobbyists and the small guys don't.
The big guys would rather not have to comply with these rules, but typically their take is, well, if we're going to have to anyway, let's at least make it an opportunity to drive out some of the scrappy competition and claim the whole pie for ourselves.