Vehicle stealing

[Rednas]

Couldn't find a thread on this so I thought I'd make one.

From what I've seen in the current footage, everyone has access to all the vehicles from the start. Certs only help to specialise and unlock mods.

Now what if I pull out, lets say, a super upgraded/pimped tank. After some combat, I decide to get out and repair it on the field myself. Can some random player just walk up and steal my tank while I'm out, repairing it, effectively stealing my resources and cooldown time? (This happens a lot in games like BF3) Or will there be some locking system on it, like only squad/outfit members are allowed to enter?