It's a terrible idea.
We are totally capable of winning this election without resorting to smear tactics.
In order to garner votes for John McCan't, Republicans have been trying to get the "uninformed" vote by spreading false rumors about Barack Obama (Michelle said "whitey," Barack is a Muslim, and Hawaii falsified his birth certificate). Spreading derogatory things about John McCain on the Interwebs is not something that we have to do to win the election.
But we can try to inform people. We can spread emails that will inform people of John McCain's...
-Involvement in the Keating 5 scandal
-His uncomfortable response to the Viagra/birth control question
-Support of repealing Roe v. Wade
-His lack of knowledge concerning geography, including his imagining of the Iraq/Pakistan border and the existence of Czechoslovakia.
-His morbid sense of humor, including jokes relating to killing Iranians with cigarettes, apes raping women, and Chelsea Clinton's ugliness.
WE CAN'T BECOME THEM. We can win this election without smearing John McCain, and hopefully people will see that the listed topics above are truths, while the smears regarding Obama are totally false.