This plot bunny comes by way of Sothavy, a member of the Yahoo Group
Plot Bunnies. It sounds interesting and I've been bitten by the bunny.
Here's the premise...
I have a plot bunny where Harry never gets caught in a prank. It becomes a big contest on who can successfully prank Harry. Nobody is able to until one day when Harry is spectacularly pranked. Later it turned out that Harry was the one who pranked himself (to get people to stop pranking him). When they (or one person) finds out, they decide that Harry is Prank King (or something like that.)