In brief: if you think piracy is a “victimless crime,” you’re just rationalizing your own bad behavior. It has real consequences. That said, I’m lucky enough to have a lot of support in the fandom–but I also know there are PDFs of my books out there on the Internet that I didn’t put there.
I’m sure none of the people reading this would steal a book, but maybe if you’re talking to a friend and they say “I’ll just download it off the Internet somewhere,” you might speak up and say, “Can you really not spare the five or ten bucks to support the author? And if you don’t think it’s worth that much, don’t read it.”