I had to move where i have my stance as I'd end up pulling big groups and accidentally turning it off during my aoe combo spam. The only time I've had other tanks steal hate from me is if they go out of their way to use provoke or they have better gear than I do even synced down. Now the thing I tend to see is tanks doing is not using cool downs or using provoke at odd times like on bosses when they clearly should have hate, but it's a boss that acts like the 2nd boss from Quarn. Or a boss that turns around to do a targeted move. That and never using reprisal like ever.