Tanks get instantly queued and have no incentive to stay in a party when a dungeon with peculiar mechanics is randomly selected. Many, many, many times I have specifically queued for a dungeon to have the tank immediately leave when he or she sees which dungeon it is (I have seen this mostly happen in The Stone Vigil and Pharos Sirius).

Since all players have the option to Withdraw from duty finder if they are not ready, to Commence the duty and abandon it without even attempting to play is unacceptable when other members of the party had to wait as long as 45 mins to 1 hour to form the party.

Tanks who abandon the duty immediately should be penalized for much longer then the current time is set to, I would suggest one hour, about the time it took the DPS in the party to wait for the group.