As much as I'd like to blow this off as more urban legend crap, I dunno...
True story:
A few years back I was stationed at Ft. Hood. A group of us, maybe 20-30, rode from Ft. Hood down to Austin for the Hot Import Nights car show. On the way back up, at night, we were riding in formation doing maybe 70-ish in the right lane. Little to no traffic, when we encountered traffic everyone just shifted to the left lane, flowed around, and went back to the right lane. Nice and mellow overall. Well, we got to one particular car and began shifting lanes to go around him, and he swerved at the front of the group. Fortunately, nobody was hit, but then he began swerving at each individual that attempted a pass, and brake checked the entire formation while straddling both lanes. This game of swerve at one person while another gunned it up the opposite side to pass went on for a bit until someone with a CCW pulled up alongside him, fired a warning shot in front of his car, and pointed the gun at him. He calmed down and let everyone pass, and we all rode away.
I heard from other members of the group later that he followed several of them to a gas station and proceeded to get out of the car, yell about the gun and how he had his preggo wife in the car with him, and how the cops were on their way to arrest all us crazy bikers. From what I recall, there were about 8 bikers at the gas station vs this 1 guy in his sedan that at most could have held 5 people, and this was after he found out that at least 1 biker was armed. I don't remember the cops ever showing up, but some people, car club or not, DO hold that much contempt/craziness/aggression towards motorcyclists.
In regards to this TNT club - well, I've seen it happen WITHOUT any type of peer pressure from a gang. It's not a far stretch of the imagination for me to think it's happening/happened.