well, if it was an honest, trustworthy guild, sure, we can say they are being unfair... but ensidia... i mean come on... they always do that crap, once they find a bug they go all the way using it till they get what they want, and they were not punished before, they deserved it
if there is a bug in the game, you are not supposed to exploit it, thats it basicly, there is a bug + you avoid the bug = clean kill, ensidia wont do that... they find a bug, they will NOT avoid it, if they were gonna kill the lichking anyway.. why didnt they avoid the bug just to make sure blizz wont punish them? exploiting the bug then claim its not their fault is not.. right..
same as if someone left a stick on the road.. you wont keep walking straight till you hit the stick and fall and then say its not my fault, you walked the path, you pay
anyway, their win was not clean, aka not ligal, they dont deserve first win, that doesnt happen in wow only, even in ffxi and many other mmorpg, programming a mmorpg game is seriously complicated business, dont expect it to be bug free, specially with wow as they try to make it "shiny", we just need to avoid the buggs and report them, its part of our responsibilities as players same as following ethics in-game
thats my personal opinion