A good point is brought up by Amiyuy in the thread -- the process of creating a legendary, or having to keep farming for an extremely uncommon drop, tends to wear people out. A healer on track to build a Val'anyr can't reasonably expect to take any time off for fear of missing one of the inconsistent shards, and my guildmates and I continued to farm Black Temple well past the point that anyone was getting even offspec gear upgrades because we just couldn't get a main-hand Glaive. With another legendary coming out in Icecrown Citadel, guild leaders are facing the headache of figuring out who'll get it, and we've already fielded questions on our tip line on which class gets the most from Shadowmourne and whether Blizzard could have nixed the stamina on it to discourage death knight tanks from picking it up (!).
So readers, I ask you -- are legendaries good for the game? If your guild was on a position to get one, did they ultimately help or hurt you more? And is the painful process of getting a Legendary the real source of the trouble, and not the item itself?