My 2c, i mainly have had good experience with tanks and DF in general. That being said, if i run into one of the elitist d-bags it mostly happens to be a tank. However i dont think that this has anything to do with the role of the tank but rather the short queue times on the DF.
D-bags want to get their runs in as fast as possible and if you want that you have to roll a tank. If dps or healers had the shortest queue times i think you would see more d-bags in that camp.