A lot of my co-workers in other departments of my facility will have a surprised look and say "oh, wow, you play, too!? thats a badass shirt. whered you get it? when do you usually get online? whats your KD?" etc. etc.
Ive developed friendships and great conversations from this t-shirt, as COD somewhat represents a community of obsessives such as myself and others and brings us together. this is generally done because the game brings an intensity, a focus, a drive, a rage and absolute joy to ourselves as we play. Its our way to get away from life's issues and sometimes we feel as if we are the only ones who feel the disconnect. Where in fact, we are all the same..
...so to mix our social life with our gaming life is always a pleasant experience for me.