WELL. Seems that hairy underbelly of convention culture had long evaded me. Fuck. I guess there's the main undercurrent we all find in common: Jealousy.
Rules from me regarding general goers: Again, be careful who you associate yourself with. I'm not just talking about the professionals and those in the limelight, but also other groups of people wandering the halls on the weekend. Anime conventions aren't always full of fans sometimes; the conventions out here also attract carousers, hipsters, and junkies, especially at night, and they also have their own social circle orbiting conventions among other places they frequent. This also tends to loop around other close knit convention goer groups in and out and word of mouth easily spreads through to them.
So if you want to make friends at conventions, analyze closely, get to know them, and keep a watch on them over a course of time. I've had a lot of garbage throw themselves out because they turned out to be hypocrites or got themselves in the disease known as SJW Faggotry and atrophied away into the NPC hivemind, but some you have to toss out and say you don't know them ASAP.
Some of these people also can be criminal; I've had a cosplayer friend who had her entire wig collection of up to fifty some stolen by some thot she befriended years ago, and said thot is currently serving a hefty jail sentence out in Texas right now. No, my friend never got her wig collection back. Catch social cues, what they like and how they act, but in the face of "appearances can be deceiving", trust your instincts and back it up with the stimuli you got.
Finally, in light of Vic Mignogna's situation, and what he's doing, I'd give another word of advice: If you know you are innocent and still want to attend conventions, do it. Actions speak louder than words, and your prescence means a lot if you know you didn't do shit. Fight back if you need to, but always avoid starting shit. Most SJWs never return to conventions thankfully the year next, as I've seen; in my case, they usually gush over Marvel Cinematic Universe actors these days and fujoshi their way out there. Despite what I thought over the years, for many, anime is but a fad, and thankfully for them they go on to the next thing and fuck off out of our general direction as soon as the next trend hits. Finally, as common sense dictates, if shit is bad, then just don't go. Life is bigger than just some anime convention out in the middle of fly over America. Go to Japan if you want. Fuck it, I always say.
I think anime conventions will only get better if are more focuses on creative and artistic aspects of it, but knowing human nature, and the current social and cultural climate these days, I wouldn't hold my breath.