With lots of ones and zero's!

On a more serious note. I believe hex is only dispellable by priests (and mages or druids. Depends on if its a curse or a magic debuff, I cant remember. :<)

Other then that, most hex abilities are done on people in close range, but not the tank. In one case I can think off, it's in a small aoe radius (shadowhunter boss in Lbrs). I think tanking the mobs that do it away from the other party members should already take care of it quite a bit.