People need to put sticky grenades on thier vehicles more often, its the perfect security for your ride.
Best places for them would be to bouce the grenades off the ground to the underside of the vehicle. That way they have less chance of being spotted and being prematurely blown up by fire. Some places on vehicles dont like grenades on them, such as the hellbender doors (50/50 chance of sticking), but you can get max grenades on a single vehicle.
Just think of the surprise to the person hijacking your mantra while your capping a node when it all goes boom?
Of course you still have to detonate the mines
and you gotta walk now
It also makes the perfect trap for enemy pedestrians. Bail out of your vehicle and let it coast right next to enemy. Let him get in and then detonate it!
Thats always a fun one
Combine it with spider mines...