There are no free servers, someone has to pay for each and every one of them. People usually make the mistake and think we hack them in some way. We don't. Some cheats are based on addons, while others are working just like standalone mods. Everything is completely legal. Hacking websites is not.
Blood, what's an outside advantage? It could be better hardware, reactions, intelligence, experience and/or software. Skills and winning doesn't mean much to us. It's pointless, some score somewhere on the net. How will online-game shooting skills affect real life? Sure some people might argue it's fun to win, to prove that one is better than the rest (in that game). I for one don't regard mp-game shooting skills as something useful and positive. It could be compared to being the best cap collector. Here we don't cheat/tk to win or to get an edge. We cheat/tk because we think it's fun, and that's what games are all about. But sure it may remove the "realism" and remind all those people that it's a game they're playing, and even turn the current match into a farce. (More than it already is).
The servers (as in box, screen, hd) might be yours, but that doesn't make you kings. It doesn't make it illegal to connect to it, or play around as one wants. And what are (unwritten) rules if they can't be enforced and if not everyone agrees to them? If you don't like what we do, ban us. If you can't ban us, well, lucky for us and the rest of all innocent players who don't obey or just are disliked. I think that someone who bought a game also should be able to play it (the way he wants). If an admin wants to ban someone for not pretending to play along with the rules, he's free to do that. But the guy who got banned will also be free to get back in if he can and wants as long as he does it legally.