There ARE other options, after all; you don't have to restrict yourself to either the corporate party or the faux-labor corporate party. More to the point, if that's all the Dems offer and you don't want it, you don't lose anything if voting for a third party costs Democrats the election. You could, however, gain a viable alternative to both the major parties and, no matter how unlikely that may be, it's a better chance than you have voting Republican or Democrat. 0.1% may be crappy odds, but it's still infinitely better than 0%.