As a DPS, you should know what Duty Finder entails: 20+ minute queues. If you don't want to wait, make some tank or healer friends. If you don't want to risk it, form a party on your server or pay a high level 50 to come with you for the run. As long as those chests contain valuable items while the run awards no bonus whatsoever, people will be coming in, looting your chests and then leaving. It just so happens to be tanks/healers that do this the most, but any class is capable of this. Again, make some friends instead of blaming the DF. DF = random members with no loyalties whatsoever. Accept this and move on.