Ooh I'd forgotten about the FSM.
Jediism began as a joke during the 2001 Census when someone realised that if a certain number of people claimed to be Jedi then it would become an official religion. The idea then snowballed and although they don't believe in a God, they have 16 rules to live by which basically say be nice to each other and be nice to yourself. I can't help thinking if we all kept to that then the world would be a better place for everyone. OMG is the force with me