While pirating music or movies, one may try justify ones actions, but deep down it feels wrong. This doesn't even feel wrong. These parasites had it coming.
I don't feel wrong pirating music or movies (especially considering it's legal in my country). I think trying to apply laws of limited amounts of goods (physical objects) to unlimited amount of goods (digital files) is silly.
It still feels wrong when popular artists do not get paid for their work because it's more convenient for people to pirate it.
I mean, creative/artistic efforts take a lot of time, regardless of how easy reproducible the results are. By paying for their previous songs, you're basically funding their next songs, something you should be interested in as a fan.