What are the legal repercussions for getting in a still-running car that was abandoned on my property and moving it elsewhere?

I live in Los Angeles, across the street from an elementary school, and every day some lazy parent decides that it is okay to park in my driveway like it’s their own personal parking spot instead of waiting in the designated pick-up lane. I’ve had parking enforcement come and hand out parking tickets, but that doesn’t seem to stop anyone. Today, a parent parked his vehicle in my driveway, left the car running, and went across the street to the school where he waited ten minutes for his kid to come out. If I were to walk out, get in his car, and drive it off of my property, in what kind of trouble with law enforcement would I end up?

Written By: shwaar
Source: http://bit.ly/2IqLE9X