I've been following this story as its been developing and as said previously there are always 3 sides to a story. I think this has become very public and because of that the people involved have gotten backed into a corner from which there is no way out without some damage to reputations so they will continue to repeat their own story. I don't know either side personally had only heard a little bit about OpLionClaw and nothing about GMR before but my 2p.
Most of the airsoft community wasn't there and the facts are being muddled. The video that GMR released does have some cutting and editing, both sides agree there was a significant time dif between the two confrontations with McKnight and being kicked off the site. Its also a little odd that the number of people in GMR that were kitted out with video cameras hasn't been reflected in the edit either, but the from the video the GMR claim of being manhandled by OLC staff appears to be truthful. Its also clear that things escalated when probably there wasn't a need, its a game after all but people get heated. I've thrown my toys out of the pram occasionally, we are all guilty of that sometimes.
However even in GMR's videos they admit to pushing the boundaries of organisers rules, they also admit that they do it regularly. Chances are the various national events ( as airsoft is a small community) are totally aware of how GMR operate and are making an example of them, the bigger they are the harder the fall.
In truth I and many of us would probably admit to occasionally trying to bend some of the H&S guidance to gain just a little better fire position etc. But some of the stuff they pulled definitely breaks not bends my own first rule of airsoft "Don't be a dick.". Jumping from the 3rd floor of a building onto the roof of a 2 story building def a stupid idea. Breaking a window ( half broken or not) in a building due to be demolished, I see where you are coming from but its not my property so I wouldn't break it, plus the H&S implication of broken glass now on the floor has increased the risk.
Finally Mil-sim, I thought the idea of this type of game is to follow the orders given by those in command as if you were really in the forces. Yes whoever it was that stated soldiers can refuse to follow an order if it will lead to an illegal action is correct. However from what I have seen they are given orders to carry out specific tasks in specific ways and they refuse or worse go off in a huff f'ing about ignoring the order, now in most institutions I know if a superior gave you an instruction and you didn't like it, it then becomes your duty to try to reason with them, not say you are going to do it then do it your way instead. Mind you how you word/tone it is up to you and might have changed the outcome.
If you haven't seen it, there is a video explaining a ban they received from a previous Milsim game in the first few mins of the video. At 29 mins they show some of their training and selection for new players, seems to me they take themselves very seriously. As it happens I've joined pretty much the anti team at one of my local sites, the only requirements are a love of airsoft, and having a sense of humour so their process is a bit weird to me.