Leaving aside the "IT WAS A MENTOR!!1!" silliness...

Quote Originally Posted by worldofneil View Post
They'd already get a penalty if they left the duty, realistically what else do you want them to do?
Personally, I advocate that the penalty for leaving a duty should be equivalent to the time remaining in the duty, not just a flat thirty minutes. So, leave a dungeon at the start of the run? Ninety minute penalty. Even tanks, who might be happy to sit out for thirty minutes because they know they can requeue instantly might put a little more thought into it if they knew they were going to be locked out for an hour and a half...