When it's smooth, it's smooth. When it's not, it's usually the 'tanks fault'. People often try to cover their own mistakes seeing as it's easier to lay blame than it is to raise your hand and say hey, I goofed - which, as a tank (and in person) I have no problem doing. It's not like tank errors aren't noticable, so you'd just be fooling yourself anyway. If I see DPS/Healers pulling ahead of me (three strikes, out), I stop what I'm doing, have a sip of the tea and enjoy the show. As the one who's job it is to make THEIR lives easier, going out of their way to make mine as awkward or as unenjoyable as possible is nonsensical.

What's the cure? None. I'm happy mechanically, and people will be people. You're either a tank or you're not, and no amount of incentives (shorter queue times & higher rewards) will sway most people if they're afraid or simply don't enjoy the masochistic lifestyle.