Comment Re:Try again... 4? (Score 2, Informative) 226
The definition of stealing does not require tangible property, it just involves depriving the owner of that property.
If you take a trade secret from someone and share it with the world, you have stolen the trade secret, because, while the owner might still have the information, they have been deprived of a secret that was not yours to share. Plagiarism too is a form of stealing, for you are depriving the author of a work from their name rights. (And yes, while not honored in the U.S. outside the bounds of copyright, I agree with the moral rights of authorship.)
Copying a song does not deprive the owner of the source copy nor the author of the original work of anything, hence it is not stealing. It's not even a crime morally. In the U.S., Congress has decided to sometimes make this a civil crime called copyright infringement, because the Constitution allows them to do so if they think it will encourage more work from those authors. Something it's not a crime at all, like for older works or government publications.
In other words, I agree with your sentiment, but don't wrap the definitions of theft and copyright infringement up in the terms of tangible property. Intangible things can be stolen, too. Focus on how it deprives the author of something they previously possessed.