I do it all the time on the second taunt on Festergut. I tank in bear and take the boss second. By the time my the first tanks stack drops off I am usually at 9. This is very bad if he is trying to over aggro me. After the taunt off me I immediately drop to kitty and cower. From there I white attack for 15 or so seconds then go into a DPS rotation for 15-30 seconds depending on the other tank then back to the front and bear to close the aggro gap. It is a bad idea to do on say Saurfang or any boss with a multi-target ability.
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