Yeah, they are totally in bad taste - gun jokes, in general, and especially at the moment.
Of course, at the time I made the stupid comment, I was listening to a very long rant about how everyone in America is violent, how America is full of serial killers, and how all Americans would kill children for ipods, and America is full of gangs, and Americans love guns...
So, at the time, it was sort of... in with the theme of the conversation...
Lucky for me, we moved into London, so I never see this person ever again.