My nominee would be the story I heard once about this guy in Chicago who dug out a parking space for himself, went to get his car, and returned only to find the space already occupied. Now, the normal, reasonable reaction would be to get angry and find another spot.
This person did not take the normal, reasonable route.
He hooked up the ol' garden hose and sprayed the offending vehicle with water until it was coated in an two-centimeter-thick layer of ice, after which he left in explaination a note that read, "Want the spot? Fine! It's yours 'till spring!"
Rude, peverse, quite probably illegal--but definitely not overly subtle.