freitasm:
On a private property - e.g. Geekzone - this works well. In public, censorship can be easily used to mute the cries of oppressed people. I suggest reading Fascism: A Warning, by Secretary of State Madeleine Albright to see how perfectly legal laws that protect the citizen's rights can be used for evil when the wrong people get to power, pushed up through the ranks thanks to populist movements and wrong messages like the one spouted by nationalists.
This also concerns me but I now think it is the lesser of evils. There could be some kind of more formal appeals process along with the censorship. But if nothing is done, the monsters who spread this poison and celebrate the results will win anyway.