I did that on a guy I was in college with during USA '94. Remember those old IRC Newsgroups. Put his e-mail address on it and everything. He got his own back by going into the alt.rec.pyrotechnics newsgroup in my account saying their group should be banned because there was a faction of the IRA in our university (DCU) (there wasn't) that were using information from the newsgroup to build bombs.
Oh the LOLs we had.