I'm pretty sure I was a decent human being to everyone at that London meetup. It really takes a worthless scum-sucking piece of human refuse to attribute Dexter-like serial killer tendencies to someone behind their back (for protecting their already bad tinnitus from some giant-ass ceiling mounted speaker two feet overhead in a dive?), while using their website, even, and participating in live community meetups for their website, when they did not disrespect him in any way.
99% of the NeoGAF members I meet in person are cool people, and usually any issues regarding the site or how I run it or me personally, if they happen to exist, can be hashed out cordially between adults over a beer or five, and we'll have a laugh over any bans or drama that happened on the site. The internet is the internet, and everyone behaves how they will here -- it's all bullshit, by the way -- but real life is a different deal. Generally you don't act like a basement dweller anon dipshit to people you've met in the real world.
As for snitching: there's no such thing as snitching on NeoGAF. There is such a thing as Snitch on NeoGAF, though. G'nite.