First, if you are of the - its morally wrong crowd - just keep moving. This is not a diary of interest to those self editing milquetoast Democrats who are still mad Obama didn't take Federal funding in 08 and would rather lose every election than play by the rules as they are.
If you are against Hilarity for "rational" reasons such as damage to the Democratic brand, giving Romney an excuse for losing, etc. - read on.
If you are worried fecal boy might actually win the general, I have nothing to say to you.
The solution is easy - all Democrats should vote in the Republican primary and give it to googleme elmo, but WE SHOULD SHUT UP ABOUT IT.
A quiet viral email or robo call strategy that offers a low profile and deniability is what this calls for. Trumpeting it on the Front page and then bitching about it in the comments is all the Rovian empire needs to blame it all on the Democrats, whether they vote in the primary or not.
So - if you know a Democrat in Mich - send them a chain email suggesting the Hilarity strategy, but stay off the internet and MSNBC with it.