Playing Halo Reach online, if there was a point of contention about armor abilities is was Armor Lock. I've heard it called "cheating", "for noobs" and strings of curses. But why was that? Well apparently "fair" in Halo meant the ability to kill people with the same number of bullets from the same guns in the same ways as in previous games. So Armor Lock's terrible sin, it seemed, was disrupting this harmony and daring to force people to alter their rote-ass pattern. It demanded that you, shocking I know, stop shooting for a damn second. If you just waited, of course, Armor Lock was not only wasted, but a handicap.
Then there was the charge that it required no skill. Technically, pressing a button generally doesn't. If you wanted to Armor Lock too early, and wait around for certain death, or try too late and die before it activated, then that didn't need any skill at all. Failing at Armor Lock was easy as hell. But Locking just before you get melee'd and coming back out to kill them instead, required timing. Blocking a missile or wrecking a vehicle with Armor Lock required timing...or luck. And that describes a whole lot of things in Halo, like shooting, or throwing grenades, which people also think is cheating. Anything that disrupts a "combo" just plumb ain't fair it seems. If that's your definition of unfair, bring on the cheating, say I.