Taunt in PvP, why not?

We already have so many CCs, some make you run like crazy, some make you recover health, some make you imune to all attacks, we even have a Mind Control ability. Why not an ability to make others attack only hit you? 1sec, 6sec, put into it a DR.

Will it break PvP? I doubt. In fact it will create the possibility for tanks in PvP, so blizz can put PvP tank gear there (so tanks won't be the only ones without free epics) and there might be more tanks in looking for group channel.

What do you guys think?