Okay, so I think the GM should just draw the line and stop this. The is, from what I can tell, a fun, casual, absurd Street fighting role play. You guys need to step the fuck back and stop harassing this guy. Seriously, take it somewhere else. 

Jeez why can't you people just chill and have fun? If you think something's up then go somewhere else or better yet, create your own roleplay with its more highly realistic setting and story.