Heywood, there are no unwritten rules. And if you think there are, then you have bigger problems than just being a theist on an atheist forum. People get banned for various reasons if they break the rules sufficient to warrant it, theist and atheist alike. You are not privy to Staff discussion; please take your conspiracy claptrap elsewhere. Artur was banned for trolling behaviour. Let that be an end to it.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'