The enemy can build only seven vehicles if you stole an enemy tank.
Therefor steeling an APC and use it to rush into the enemy base is stuppid.

What you should do is guard the enemy vehicle in your own base. Just let it sit there.

Example:

Situation:
Us: 7 vehicles
Them: 8 vehicles

If we/I steal 1 vehicle from the enemy, we can build 1 more vehicle and they can't !!! The enemy has maximum 7 vehicles at this time !!!

So stealing an APC and parking it in your own base is a smart thing to do. The enemy can't replace the vehicle until it is destroyed, if you get the vehicle destroyed you can't replace it, but the enemy can !!!

An APC is not worth that much anyway ... u might as well get one of your own team.

Hope you use the strategy while you're on my team !!!