Honestly, if they make the 'punishement' for leaving more harsh than it is like some of you suggest.. Don't be surprised if DF becomes a ghost town. Queue times will sky rocket and the only people getting anything done will be those in large FC's who can fill a full party. Then what will you cry for? : "Harsh penalties for premades since I can't get through this dungeon! It's not fair that I have to wait hours for it to fill, and they get to go through so quickly.. they should only get 1/4th the reward!"

Serously, get over yourselves.