Being a person who only logs into Facebook once every few months to assure I am not dead I say its a toss up. Personally I am not one to join gaming, groups, etc. types of things through that social media. It is just more of a keep my personal and gaming life separate just like folks do with their work and personal life. If there is interest in it I say go for it as its not a terrible idea so may as well have fun with it.