This is what they would do in real life..do they never turn it off and despawn or do they wander off and never come back, or..?
A simple solution is to use simple native trainer to spawn a rocket launcher, and destroy the cars.
Whenever I load the game, I get a loader.loader error. Same with multiplayer..I have removed and changed scripthook around. Removing scripthook.net seemed to have helped, but it destroyed a lot I had, and now I just cannot load LCPDFR at all. Removing regular scripthook helps, but removes many plugins i have.