I cannot agree with the way you've set up those groups. Mainly because I don't think it's that difficult to ban the harassment and hate speech without erroneously silencing someone who shouldn't be silenced. I don't buy the slippery slope argument on this one.

I honestly think that Group 1 is more often, "I'm fine with the others being harassed, so I'm going to pretend we're talking about criticism or something like that instead of harassment."