[cf498]

While roenxi explained it already, let me add to that. A forum is a voluntary association where you can easily exclude people. Its the equivalent of your living room. Keeping your livingroom or your peer group free of Nazis isnt difficult, you just tell them to leave. Children in kindergarden manage to do that, "you are stupid go away". A state is not a voluntary association. We are all stuck with each other and somehow need to get along. There is no real "ban" option. If you are talking about anything remotely comparable in real life you are talking about a military struggle. I dont think we really need to have the discussion why this is a bad idea?