The problem with your argument is that you conflate procedural arguments with arguments on the merits. No person is entitled to an account on a website. Howeve

The problem with your argument is that you conflate procedural arguments with arguments on the merits. No person is entitled to an account on a website. However, it is sometimes bad and sometimes good to ban people, depending on who they are and what they were doing. I believe it's good to ban a Nazi and bad to ban a critic. I see no inconsistency here. It's attractive to think there's some simple rule (like ban nobody) that lets you get out of deciding whether people are good or bad, but that's a trap.