If the result of entering the Konami code were sexist, misogynist, homophobic, racist, etc. I could see how someone might not appreciate it. I don't know what the issue was in this instance...but, I've seen nerds make pretty stupid jokes that cross lines. (And, I'm coming at this not from a politically correct sort of perspective, but instead from a, "check your privilege and try to stop being an asshole to people who have less power and privilege than you".)