Insofar as it involves "somebody using something in a manner not explicitly permitted by the owner, but in a way that also does not prevent the owner from also

Insofar as it involves "somebody using something in a manner not explicitly permitted by the owner, but in a way that also does not prevent the owner from also using it," I've always thought the unauthorized use of copyrighted material was closer to trespassing than to stealing. Like trespassing, the legal definition of piracy (in the context of intellectual property) covers a wide range of activities, from the benign to the outrageous.