Well, it is a game, so morality doesn't really come in to it. I see it as kind of silly to be in a horde chasing a lone guy for a 1 in 5 chance of getting the kill on the guy, and I see it as ineffective tactics for all those guys to give up alt and E to horde one target. On the other hand, the opportunity to bust a conga line of fixated chasers off a friendly's six can be most satisfying.
See, for me, the duel is the way to enjoy the chess-game aspect of ACM, usually with someone I like. Whereas, MA fighting IMHO is not usually about the chess game. Like it or not, it is usually about murdering the other guy while watching for stabs to your own back. This to me is fun. Sometimes. In SMALL doses. I have to say...for me, it IS about the killing, the visceral sensation of hunting, fighting, and killing, my mind against theirs, and getting clean away with the dirty deed. Albeit in cyberspace, virtual killing having the distinct advantage of not earning one a prison sentence. To me, the people who use "lame tactics" and never try to learn are simply not developing their full potential to kill often and well. It is all one to me you see, tactics, ACM, and sneaking up on the low six to murder the bandit, all just tools I use so I can have the pleasure of shooting down the other plane more often and more easily. I may shake my head a little at other pilot's refusal to develop their talents, but really, in the long run, the less they learn, the easier it is for me to hunt them.