Someone told me there's a law somewhere that says you can gack anything and even use it on your website if it's for education and not entertainment. Sounds like urban legend to me but I trust this person (trustwise, maybe not brainwise) and she says her lawyer verified it. If I download a Dead Kennedys song and listen to it to understand the psychology of aggression is it legal?

I'm half joking, half not. I've had to listen to stuff for school in humanities classes (Beethoven, etc.) and besides, I just don't get why it's legal for me to gack pictures for my website but I can't go near music!