Over the past month or so I've noticed a steady trend of tanks completely ignoring the party and rushing through dungeons as absolutely fast as possible; only to get bent out of shape if they die because they left the healer behind.

Now, I'm upset about this (as a healer), but I'm going to put that aside for the moment. What I really want to know is the mentality behind it. I understand not waiting for Stoneskin to cast on four party members, but I find it silly that Stoneskin 2 was added and we still don't get a chance to cast it.

Any time I ask about this in the dungeon itself I nearly get dropped for insubordination, so I wanted to ask here instead: Why is it that tanks always go as fast as they possibly can without paying attention to their party?