Don't know if you kept up with the Mayor of Baltimore - Martin O'Malley - now Gov. of Maryland.
There was a Dem mole on FReeRepublic who lured another guy into scandal-mongering on the Mayor's extramarital affairs..... MD4Bush IIRC.
His identity was disclosed by subpoena and there was a hearing on the whole fiasco.
http://www.baltimoresun.com/news/local/bal-md.personnel02nov02,0,2518135.story?coll=bal-local-utility