This didn't go over well with administrators, but pranks like these always go over well with me. Frankly, there should be many, many more.
Last year, Yale students showing some sense of humor were able to infiltrate the Harvard section and supplant placard cards that were presumed to read studying is cool, or something nerdy along those lines. Instead it read "We Suck." Kyle Garchar of Hillard Davidson High School in Ohio had the same idea when facing off against rival Hillard Darby.