Yawn. Find less lazy talking points. Let's substitute "kicked out of a bar for being a loud obnoxious asshole" then, because that's also unwelcome despite not being illegal, and maps very well to trolling an online forum.
You're very eager to weaken the private property rights of others, as well as to give a LOT of power to the government (legality as the only consideration) and I don't think these thing would work out for you like you hope.