The first tank we got was wearing a robe and various items from a vendor , the group voted to kick him. Perhaps he should just get a club and some ancestral woolies and say he was a barbarian?
The second tank said "Wailing caverns F*@# it" and left.
The third tank was a paladin, wasn't great at holding aggro and the mobs just sort of attacked everyone
Tank four left without a word immediately after zoning.
Tank five, was a druid and although wearing a holiday outfit did just fine and the instance was finished, although the tank did roll need on a wand from a rare mob and all the dps left and was replaced.
Not a bad start I think.