It’s their server, they can do whatever they want, including arbitrarily banning you. Complaining on the forums won’t do anything, and trying to warn others won’t help because PC players rarely post here anymore.
Of course they can, which is why I’m just warning anyone who happens on it. It’s no big deal as that server is nothing anyway.
@RogueDog327 our servers are running VAC; “client hacks” get banned.
Most of what you’re calling “hacks” is just thousands of hours of practice with the game’s mechanics. I believe that most of those players are likely stacking on the Attacking team rather than a particular faction.