Uh, because it's illegal?

This dumb Slate article gives the wink wink, nod nod treatment to people voting twice (italics in original, bold added):

At the same time, the Florida fiasco also made it clear how imperfect the vote counting process is—like "measuring bacteria with a yardstick," in mathematician John Allen Paulos' phrase—and sends the signal that your vote probably won't matter after all. So, Democrats try to register every warm body, since new registrants tend to vote Democratic; for the same reason, Republicans are sorting through voter-registration forms one by one, looking for signs of fraud. Some people might justifiably worry that their precious vote won't be counted—and vote twice.

For all the new concern about double voting, though, the odds of getting caught remain minuscule. Comparing voter databases county by county and state by state is a needle-in-haystack undertaking, even with the aid of computers. Why not vote twice then? Michael Moore probably shouldn't do it. But you probably could.

Just don't tell any reporters.

Why not vote twice? How about the fact that it's illegal and morally wrong? This is taking Slate's obsession with being counterintuitive to new, absurd extremes. Coming soon: The underappreciated virtues of drunk driving and grand larceny.