I used to know a mage who wore an enchanted Chef's Hat during raids. The first day he wore it to raid, someone asked him to take it off, but he wouldn't; it was his new favorite hat and he intended to wear it. This annoyed several people in the raid, who repeatedly told him to take the hat off, so the mage told them this: "When someone does more damage than me, I will put my other helm back on."
That day never came, so the hat stayed until he got bored of it.
I mention this story because you'd think with all the plate bikinis and mail hot pants in WoW, the task of assembling a barbarian's costume for a warrior or paladin would be simple. Alas, loincloths don't seem to be that popular with plate wearers, so you'll either have to put on some pants or convince your raid leader that you don't need pants to do your job.