Well, if you go back to the days of slavery, neither slaves nor women were real people.
I was under the impression it was rather common for slave owners to rape and abuse their slaves. I also seem to recall it wasn't (isn't?) rape if a husband did it to their wife legally speaking.
So I imagine the rape and molestation have at times been widespread, because they were being done to non-people.
Now, I have no citations for any of this but I'm sure it would be easy enough to find, as that is a side effect of dehumanizing, or making certain groups property. The banality of evil and all that.
That said, if a person makes a song and people just take it, I don't know that it's treating them as less of a person or in any way evil.
If you think an idea is property and a person has the right to sue you for using their idea, well that's another thing. There are different balances between the idea maker and the idea user.
I'm sure that some people out there would like to charge every time you hear a song, read a book or watch a movie debited directly from your bank account upon consuming the media, as determined by an implanted system on a chip, and if you don't want to pay or can't pay your sensory input is hijacked, but that's a little too far one way on the balance.