Just reading this pisses me off. I also carefully choose my parking spots so as to avoid door dings, etc. A few months ago, I parked in a spot at my local grocery store which was way out, with no shopping carts in sight. When I returned to the parking lot, I see this guy load his car with groceries, then leave the cart near my car on this windy day; note, there was a cart return corral about 20 feet away.
Long story short, I lost my cool, grabbed the cart and got in this guy's face. I yelled at him, with my fists clenched, and he, without a word the entire time, took the cart, placed it in the return corral, and then got in his car. Hopefully, I made a difference in the world for the better on that day.