This guerrilla effort out of Guatemala takes it to a whole new level. From what I can gather, they took wheel locks and attached them to parked cards along the street along with their a super glue product shot. It's a great idea, but I'm sure it pissed off a few of the car owners. I got this info by translating the Spanish report, so if anything was lost in translation, someone please let me know.
UPDATE: My poor Spanish translation has been corrected. These were not random cars, but actually rented cars placed by the agency. That makes a bit more sense, but could still have made some people mad if they usually park on that street.