Scammers have long used or automated calling banks to target groups of voters in hopes of either scaring them away from polling stations or tricking them into showing up on the wrong day.

But this year these dirty tricks have expanded. In a conference call with media on Tuesday, Jonah Goldman, a spokesman with the Lawyers' Committee for Civil Rights Under Law, said that these tactics are on the rise in 2008. "We're surprised at how ubiquitous it's become and how sophisticated it's become," he said.

His group had seen robocalls and flyers with this type of message in 12 states so far in this election, including Florida, Louisiana and Virginia. That's about twice as many states as during the 2004 presidential election.

On Facebook, for example, there have been at least three instances of fraudulent voting messages posted over the past two days, according to company spokesman Barry Schnitt. In each case, messages were posted saying that Republicans were set to vote on Tuesday, while Democrats would vote on Wednesday.

One of these messages was posted on the for Missouri State University, Goldman said.