We obviously don't advocate handing out physical punishments to people who park in the wrong places, and we doubt that the person who drew this was being serious, either. Anyone who's familiar with 'The Simpsons' will know the character of Jasper Beardsley, who once threatened the children of Springfield Elementary with 'a paddling' for any breach of the rules when he stood in as an emergency teacher. It's since developed into a meme, and conquered the internet.
If we'd received this on our windshield, we'd have kept it. Whoever made it clearly has some real artistic skill! As a way of showing thanks, we'd make sure we never parked in their spot again. But then we're not the sort of drivers who'd steal your clearly-identified parking space from you in the first place, so we're hopefully never going to receive a parking paddling from anybody.