Once I was sitting in my car on a park, waiting for someone. Suddenly some little kid came to get into the car parked next to me. He hit my side mirror with his head

(was funny) and than opened the door and hit my car - he was hitting several times, because couldn't open the door wide enough to get into (wasn't funny). I saw that everything in my side mirror, got upset and made a little scene with kid's father. Fortunately the scratches were small enough to get rid of them using a scratch remover.
I think in future I'm gonna have a seperate car to drive my kids...
And of course I behave the same. I can walk longer from my parking place to be sure that my car is safe...
