Noti there is some rule. If you take off, you have to land in real life. The point is how you'll land it depends on you. If you finished your mission you have to return your base and accomplish the mission.
There is some part of people who quit the game after get shot, before "crash". They suppose we don't know it, however we record every track. ;) It happens especially at A2G server, even everybody knows those people from the forum. Just I ignore it cause its their "bungle".
Mate I'm responsible only from server side problems, others just not my business.