If your response is going to be "fuck you, I won't release at all" then just stop now because that is the wrong attitude. No one- let me repeat that, NO ONE has ever- let me repeat that part too- EVER made something that could not be copied if someone wanted to. There are people that pirate the design of entire fucking CARS to make money. If you make something good, it will be pirated. It happens to software, books, car designs, artwork, sculpture, music, movies, TV shows, and just about everything else made by people smarter than you and I squared.
If you want a guarantee that it won't be pirated by some asshole then never release anything. That will show 'em, won't it. Give the world one less thing to pirate.
Or if you want to do something that is not based on fear, make a good product and release it. Maybe it will make you money, maybe it won't. Deciding to do nothing definitely won't. The question is will you act based on what you think you can do, or what you are afraid someone you've never met will do?