My neighbor keeps hitting my parked car, they admit it, but how can i get them to stop

My neigbor has hit 2 of my cars. My first car is old, but I made them repair it the first time. My second car, was hit and I made them repair it and no longer feel comfortable keeping it parked on the street. However, they keep hitting my old car, they inform me, I do not feel it is worth repairing because of how old it is, but I am fed up and want them to stop and learn how to back up from their driveway. I have also had my car hit by another neighbor when parking somewhere else. Also, another neighbor of mine has also had their car totalled from one of the neighbors that hit me. There are 2-familes that have people that constantly hit parked cars when pulling out of their drive. I do not feel it is safe to park on the street, but what cand I do?