> You've stolen his idea, he says, and profited with it against his will. And here the internal conflict introduced by the concept of "intellectual" property is highlighted. You used your own property as you pleased and in a way that did not harm or threaten to harm anyone else's property, and yet according to Bob, you've violated his "intellectual" property rights. In fact, the only way to not violate Bob's "intellectual" property is to not do with your property as you please, even though that use is entirely nonviolent. Bob's exercise of his "intellectual" property right is a violation of your property right!

Intellectual property is an umbrella term that encompasses copyright, trademarks, patents, etc. Using someone else's trademarks also does "not harm or threaten to harm anyone else's property". I know that you don't mean that, but in that case, you should offer more practical arguments against IP instead of getting all philosophical.