I don't see why we don't do that already. Find the owner, report them, file a customer service ticket, and go back to playing.
how are you going to report someone that isn't in the vehicle? In one hour of play I saw a TR sundy warped on top of TI Alloys roof and a NC sundy warped on top of Hvar landing pad. This is out of control
In the OP, you request: ... but in your reply you say: ... which implies your assessment is that there is no proper solution to the problem you outlined. (Also, Sunderers can be Galaxy-lifted into some interesting locations.)
It's really a non-issue to be honest. What is an empty sundy sitting on the top of a building other than bait for every possible anti-vehicle weapon in the game?