If you can't see why its important about ganking let me clue you in. To do it on purpose, and it is done on purpose, because I see rangers and SKs do it in my guild. Sure COA is easy. Lets walk into Demi and onto TSS. Its sloppy playing plain and simple and its about ego that they can steal it off from the Paladin. Its that simple. People get used to doing this and in the harder content their asses will be handed to them. Thats why ganking should not be encouraged. The ends hardly justifies the means.
I spoke to a Paladin that used to be my GL and he has such awesome aggro generation that warriors groan about it and he has a hpt aug on his 1h because its so good. His advice was pretty solid and since I been following it, I saw a SK deliberately steal aggro from me so I hit Taunt and I had been on HoTT the whole time and the mob was at 50%. I was kinda tired of this non teamwork attitude in a guild that stresses it is about teamwork so this is what I did. In order for him to hold it against me he had to use up a ton of mana for last 50% and everytime I taunted he taunted it back and saw him for once doing constant spells. Granted it was not well done of me but then tanks should be a teamwork situation.
The new stun is not that great. I was using it and on my old GL advice I quit. I use Akera, Ancient and Force and the Challenge for Honor. Further put in the Hand of Disruption and Taunt. You can easily tell if another tank is taunting when you see it bounce back and forth. The faster you stun the better chance you can keep aggro and they can't steal it. Get the belt from Redfang and you got a pretty solid hold on aggro. I don't have the belt but I rarely lose aggro now, altho I do want the belt just cause.
It is rather sad tho that some people think its ok to do this tho. It works against teamwork in my opinion. My favorite one when one of them was stealing aggro was to say it was on a healer (altho I never saw that it was but who knows) and the other claimed it was due to lag. The latter was a pitiful excuse when I had aggro locked in beginning and no amount of lag will change that when you try and steal it at 50%. Its sad people do this but what do you do. It is also sad with the improvement of our stuns I still am forced to chain stun due to egos.