First, why aren't you queuing them all as dps+healer or dps x2 and healer only? I am sure you would be well served by this change. The second to rule out a heal only guy joining.

Anyways dungeon queues are often all about turning the instance around quickly and not messing around with bs. If I am in a group with some guy that might be an issue, forget it I am gone (might be the response people have). That would be what I would get out of the drops in your queues.

Sure multiboxing is likely what gives them a doubt, but that's really all someone needs to have to drop a group. In the era of people waiting hours for 5+k gear scores to come knocking for crap raids, this has got to be expected.

The queue issue, not sure its ignorance entirely really, anymore than people wanting 5+k gear scores for almost every raid possible. Sure those people will be waiting for what seems like forever and that might be 'ignorant' that the content might be well in reach of half that gear score and that they would be done with the raid already if they had picked up people. But I can see their point in point in trying to weed out possible problems, especially if tanks can actual charge for queues.