One has the realize that Slashdot polls, comments, and articles are not a reflecting of the rest of the geek community as a whole. Linux and open-source is a fairly prominent topic within Slashdot, but most geeks as a whole outside the community are rarely concerned with Linux. In other words, Slashdot is not representative of the geek community. I work at a large software company in California with most employees in their 20s, and I do not recall anybody claiming to be a libertarian there. While I am sure there is somebody at the company who considers oneself a libertarian, I would have expected to have encountered a libertarian by now at work based upon this trollish question.
Oddly, the poll results seem odd when most of the outspoken opinions lean more liberal than libertarian within the Slashdot community in my opinion.