My Mrs is an expert at smashing cars up parked at the end of our drive. She reversed our car into the side of a Mazda MR2 last summer and wrote it off. Our car has reversing sensors, but she couldn't hear them over the radio
Have you tried nudging his car up the road, assuming his handbrake isn't on full. That would be amusing, or a few roofing tacks scattered sparingly under his tyres. I've actually thought about doing this one; buy an old banger and park it over his drive and leave it there. Or you could order a penis enlarger catalogue and send it to his Mrs. If you do decide to do anything, don't give them the blank, ie make out all is well and carry on as normal.
I had someone do a very evil thing to my wife years ago and I mean evil. The husband and wife moved about 20 miles away shortly after. I found out their address. It was summer and the World Cup was on. I went to the local council offices and got hold of all the neighbours names. I then sent RSVP's from all the neighbours to the evil people accepting an invite to a BBQ on the night of an England game. I parked up down the road on the night of the 'BBQ'. The evil people felt the urge to go out for the evening for some reason
![Laughing out loud (lol)](./images/smilies/emoticon-0140-rofl.gif)
but it made the bastards think
![Evil grin ]:)](./images/smilies/emoticon-0116-evilgrin.gif)