i was playing a freinds game when i just realized there was someome named player 666 and then i checked if it was a signed in player and guess what it wasnt so is player 666 a demon or evil player?
Unregistered players can change their name to whatever they want. Player 666 is someone who thought it would be cool to have an "evil" name. Names are just names, they don't really mean anything in most cases.