what the fuck are you talking about? That is not an MG 42. It's a DLT-19. It's based on an MG 42. They used it in the star wars movies. There are several differences between the two such as added t tracks and a totally different muzzle. Stop creeping.
I mean, seriously, what did he ever do besides try to talk to you and be friends? You call him a creeper but it doesn't sound like he was doing anything to hurt anyone. Doesn't sound like he was being threatening either. I'm sure, same as other people at cons, he was just there to cosplay, have fun, and meet new people. That's why we all go, isn't it?
You know who he is, hm? Obviously not. Don't be so quick to judge someone. Last time I checked someone being interested in talking to you isn't called stalking, it's called being friendly. That's what people do-they talk to eachother. That doesn't make someone a creeper. I'm not trying to sound like a jerk but why not just relax about it?