I think this is a pretty good take, in line with other forms of effective protest. I don’t actually believe that most pirates are genuine protestors, though. They are just people who don’t want to pay but feel guilty about it, so instead of just admitting that they don’t want to pay they perform some moral gymnastics to rationalise their behaviour and keep the cognitive dissonance at bay. The average pirate’s train of thought goes something like this “you didn’t give me exactly what I wanted so now I am morally entitled to everything of yours for free until I decide otherwise”.