As a Tank I generally Hate Knock Back moves that Healer and DPS have, if you use it as an interrupt or a boss that's fine. But nothing is more annoying then after you stack all the mobs together, then someone knocks a ranged mob out of that group of add...

But occasionally there are a few good players that knocks ranged mob towards my group of adds. If i see someone do this correctly, they normally get my commend.