Pirating, should I be for it or against it?

I am unsure as to whether I should support the people pirating music, movies, and software. One argument for their support could be a claim that they are forcing the big names in the industry to lower prices so they can compete with the piraters (Face it, $20+ is way to much to pay for a god damned movie!). An opposing argument could be made stating that they are forcing the same companies to raise their prices because they are loosing profits due to pirating.