Dunno what you fellas are trying to do in wintergrasp but I find it mad fun toasting vehicles. You should ride along with your faction vehicles whether it be offense or defense and defend them against other players. When you see a loan vehicle that doesn't have player support nuke it.

You get taken out rez and get back in the fight. As long as you are not afking the extra few toons in the zone are not going to cause a tenacity stack that you don't compensate for by being a coordinated unit.