Twenty candidates filed to run in the Florida Tea Party primary for state legislative races. This story says that some of the candidates are, or have recently been, registered Democrats. The story also quotes Republican Party officials as saying that they suspect the motivations of some of these candidates were to injure Republican nominees.
In 2008, it appears that all five Green Party legislative candidates were not bona fide Greens, but individuals who were motivated to run by Republican political consultants. The lawsuit filed in 2008 to find out who paid the filing fees for these Green Party candidates is still going on. However, in all five districts in 2008 that had Green Party nominees, the vote margin between the two major parties was such that the winner won with an absolute majority of the vote.