I find the "used" game market to be more financially impactful of game sales and the business of games than outright piracy. That's a potential consumer who has money, is willing to spend it on a game they want to play, but are ignorant of where their money is actually going and what impact that has.

But, on a personal level...I get it and I don't hold any animosity towards someone who buys "used". My animosity is towards the people who sell "used" games, because in reality what they're doing is re-distributing a game in a way that ensures no money is going back to the people who make that game.

Someone who illegally distrubutes copies of a game or someone who freely downloads a game is much more personally insulting to me as a developer. It's the giant fat middle finger of "your game is good enough for me to want to play, but I'm too damn cheap to want to give you any money for it" that I find infuriating.

As the creators of games, I feel it should be our unquestionable right to decide who does and who does not get to play what we've worked so hard to make.