You can't steal an idea. You can copy it but its not property. I can steal a hard drive with data on it. A drive is physical and I have it now and you don't. But if I copy the data on the drive I have not stolen it. You have not lost it. Logically IP makes no sense.
IP is an invention. It is a construct to control the market and create unnatural monopolies.
Highly recommend the writings of Stephan Kinsella.