Why? Because stuff like this only ever happens in geek hangouts?
I'll assume this will follow the predictable pattern.
"He was such a quiet man". "I send my children there all the time". "I always felt him looking at me strangely". "What about the children". "We should ban comics/games/whatever it is we don't understand".
Yes, it's bad that something like this has happened. But it happens everywhere, not just one of 'our' places.