Since I've been in a few different guilds with a few different tanking corps and this drama always seems to happen and happen the same way, I have to ask: are tanks the most drama prone?
It's best to define what drama actually is. Drama is any whining and moaning from anyone about things out of their control. If they complain about things in their control, well, then they just fail miserably and probably should spend some time outside to recenter themselves.
For instance, a tank complaining loudly that his healer always is the first to get constructs in Gorefiend and demanding that they get a soulstone before the fight even starts, is drama.
A tank complaining that they need healers X, Y, and Z, in the raid or else they won't do anything but auto-attack Illidan, is drama.
A tank complaining that they deserve extra guild repair money for their expensive plate armor, is drama. And since the tank is special, they also need their own rank to let everyone know this (but it's also practical because only they should be able to withdraw 300g a night in repair money).