Next on the list of things that "ruin" immersion:
Rogue Stealth
What fun is it to sneak past all the mobs wow po and just kill the leader when you should be immersed by killing ALL the things.
Feral Druid Stealth
See above. Besides it never made sense why a cat the size of a Tauren could really be sneaky anyways.
Go ahead and laugh or deride all you want, according to the logic put forward by the no flying and previously the Have Group: Will Travel arguments, this has to happen or the no flying until we say so argument is invalid.