So the new "norm" for tanks is to only run the dungeon if they get all BOE's. While this may seem like its easier for you to get a tank now, it wont change anything (the amount of time it takes to get a tank) in the long run. Very soon, if not already, every tank will expect this and there will not be a single dungeon run where the BOE's are fair game. Bringing you back full circle to spending the same amount of time to find a tank, and it's expected that they get the items.
Obviously they have a specific role that can only be met by a single class, Warrior (Insert argument about druid tanks). In my opinion this is just another side affect of retail WoW spilling over to Nostalrius and we as a community need to nip it in the butt before it gets out of hand.
By all means it is my/your right to not group with these tanks and to keep looking, and it's what I choose to do. (Same thing for groups that reserved items)
Worst thing about this is it's community driven.