I voted for them in Germany, but not because I want to pirate music and movies. The bigger issues are censorship (a huge attack is just going on in Germany, giving government the power to block any internet sites they want with no possibility for the victims to do anything about it), software patents (and other patents), privacy rights and so on.
I used to vote green and might do so again, but I have lost faith in "eco power" - I just think some things that are labeled eco these days don't deserve it, and I am not sure if the greens understand it.
Ultimately I figured I am working in the IT industry, and therefore the pirate party is closest to my interests.
My view of democracy has become a lot more cynical, too (not only because of the extreme wasting of tax money in the wake of the recent economic crisis). That reminds me: transparency is another huge, huge point I expect from the pirate party - I think they want to make politics more transparent (employing modern digital means), and that seems to me to be the best way to create a sane society and reduce tax payer exploitation.
I think democracy is just another "war" - it is not about finding a common goal for society, it is about members of society struggling to get the most out of society (that is, exploit society a ka the other members to the max). So why not vote to get "my share".