im a Hunter myself, and if i see my treath going to high compared to the tank i always use FD ( and MD after mostly )
i also got an alt tank ( DK ) and the other day i was in an instance with another hunter and he overaggroed the whole time.. so i said why dont u use FD or/and MD, his reply: "I dont wanna nerf my dps"
I instantly left the grp and searched for another grp