Okay so I have a website [...] and I used a slogan "A fun new virtual world for kids and teens!" and I have used that for about a year I believe. Then another virtual world claiming a "stole" their slogan. When there is about as much proof as there is a actual virtual world out from wither of us (as far as I know of) and they do not have a federal copyright (the copyright.gov) neither do I. Can they sue me? Send me a C&D? Can they do anything? So I keep it up or not? I'm not much of legal expert so I don't know what to do. Any help would be awesome!