I am tired of seeing tanks and healers leaving Castrum with no penalty whatsoever.
Just now everyone left after both tanks and healers left, making me have to queue for another 30 minutes just to see both tanks leave again.

This should be reportable under the notion that they are hurting the game experience for other players. Healers and tanks should get an hour penalty for leaving. I remember I left once and got penalized 30 minutes, this time I did not maybe because I was the only one left; but judging from how often this happens I believe there is no penalty.

If not an hour because it might need some programming changes, just give them the same half an hour, so like this last tank said: "Agh, fourth time Castrum" and left, that would be a good two hours waiting for him.

There are so many other ways to grind experience, Praetorium is not the only way.