From http://abcnews.go.com/print?id=5963751,

Young voters at Drexel University in Philadelphia, Penn. have already been targeted, with students reporting that flyers have been posted around campus warning that undercover police will be at the polls on Election Day looking to make arrests.

The flyer reads like a friendly letter to fellow students relaying a warning from an “Obama supporter”: “He informed me that on the day of the election there will be undercover officers to execute warrants on those who come to vote based on the anticipated turnout,” writes the anonymous student in the letter which was later posted on the Drexel College Democrats website. “He advised me if I had any outstanding warrants or traffic offenses I should clear them up prior to voting.”