Take anything you like and someone out there with the same interest is going to make you completely ashamed to have something in common with them. Every hobby, every interest, every opinion, every belief, every way of life - some maniac with have that in common with you and do something stupid or horrible and you'll have to defend yourself and say "we're not all like that".
How often do we do that with videogames? I'm a Canucks fan and for the next several years or even decades I have to deal with people associating me with stupid rioters destroying their own city when I peacefully watched Game 7 at my parents' house, miles and miles away from the riot.