I actually stole someone's UAV yesterday this way. I felt bad, but not bad enough not to pocket it. I'm actually somewhat disappointed, because originally I was a big fan of using the UAV. Now, I feel vulnerable since everyone with a terminal knows where it is. It actually shows up on the map, very very clearly. So, I too would like to see UAVs at least bind to whoever assembled them. It'd be great if you could share it with people in only your party, but that's probably asking too much from Arma.