I spend so much time doing hunts that I've started feel a little sorry for the monsters in question. Getting to be a hunt mark would be the best thing ever to me.

And yeah, to keep it fair, they'd have make at least your auto-attacks and unavoidable sources of non-random single target damage obey aggro rules so you can't just gib the healers. Running over to them to do an avoidable AoE would be fine, though, since a ton of hunts already do that.