How is hitting this button (Tank Stance) any different than dancer hitting dance partner or summoning Carbuncle or Eos? There's plenty of times that I want to NOT have tank stance on. No one wins if two tanks are fighting for hate. Especially if the tanks aren't standing on top of each other. Boss will keep turning messing up DPS positionals. Healers have to pay more attention to who is tanking, etc. You know awfully quick if your tank stance isn't on and you are the only tank present. Then you learn to turn it on.