Petty vandalism is one of the most dull-witted of pranks, but this particular story is even dumber. Ohio teens Seth Stonerock and Derek Greenlee had the bright idea to cover a stop sign in layers of Vaseline and Saran Wrap, obscuring the sign’s message for drivers. Why this was funny, we have no idea. The prank worked all too well, as a pair of elderly women sped through the intersection and were rammed by a SUV towing a boat. Both women died, and Stonerock, still a juvenile, was given a four-year sentence and released in 2012 after serving eight months.