Of course, there are hundreds of other posts about it from the time, but that was a recent one from Vrak pointing out why the Kick debuff exists.
As everyone here said, tanks and healers knew they got instant queues because of their highly desired role. If they got a Random Dungeon they did not want, they acted very poorly until the group kicked them. It got to be so much of an issue they added the debuff to kicks.
Just like they recently responded to player feedback about people leaving a dungeon group after a specific boss they wanted. They added a Deserter debuff for it.