It is all fun and games, never bothers me in the slightest.
I did a mission earlier where 4 of us started by running for our cars.
Some dude got to my custom coquette (which I really like) before me and drove of in it.
I got stuck with some crummy pickup truck and by the time I travelled the 3 miles to the mission waypoint the battle was in full force all around a burning heap that was once my car.
I had to laugh. I love this sorta sh*t.
I mean in real life I would have been on a warpath but in a game... classic!!.. regardless of how much game currency it does or does not cost me.
lol but really though. Those people that try driving other peoples cars at the start of a mission are such sh*theads lol.