To Paul McCartney, it doesn't really matter whether I'm making a crappy metal cover of Hey Jude, or a parody of it. Why is one unethical, but not the other?
One could argue that I'm profiting from the original song either way--people are more likely to buy a parody of a song they've heard than one they haven't.
One could argue that I'm profiting from the original song either way--people are more likely to buy a parody of a song they've heard than one they haven't.