I thought of this idea a while back and thought that you guys might be interested. So Blizzard is considering making tank specializations more viable in Player versus Player combat, which I am all for because it seems tank specializations are pretty excluded in PvP, save Guardian Druids in Rated Battlegrounds. So here is my idea and variations:
Taunting in PvP
1. Taunt can now work on enemy players. When taunted, the enemy player can only damage the player who taunted them for 5 seconds. All other players are immune to the taunted player's damage.
2. Taunt can now work on enemy players. When taunted, the enemy player has 50% increased damage against the player that taunted them.
Those are the only ones I can think of off the top of my head. I tihnk that this would be a very interesting and viable form of crowd control and peeling enemy players off healers and DPS. Just a thought worth sharing. If anyone has any ideas, improvements, or comments on this, please let me know! Cheers!