On the other hand, aren't copyright owners entitled to control how, where, when, and by whom the copyrighted works are published, exhibited, and distributed, and to earn money for these works?
I know I'd feel very cheated if I found my book being sold without my permission and without being compensated for it. I get royalties for every book sold as compensation for the work I did to write it, and I'd like to think that I receive money for 100% of the books being sold. If people bought my book from unauthorized sources, they'd get to enjoy the results of my work without any compensation for that work coming back to my publisher or to me.