It's essentially like buying a real book and then giving it to your friends to read it,
Honestly, how many centuries old is the custom of lending a book/lawnmower/whatever to your friend without it being a crime? Do we have to start now?
I mean yeah, it's a very blurry issue with the advent of digital posessions, but if my sister could lend me a novel (which is you know, her property now) without the police crashing the door down, that would be great.