Did they cross a line? No. There is no line. The POINT of satire is to piss people off and provoke a little thought.
Some people so blindly adhere to "you can't speak ill of the dead" that they turn dead celebrities into demigods, idols who could do no wrong. And it's stupid, because whatever else they are or were, they were human beings, and they had their flaws.
The song had to be harsh, to have any impact. If they'd just been moderate about the flaws of our dead "heroes", no one would have noticed. You push these issues until they become offensive to some people, so that they get noticed. And for every person who goes "OMG U CAN'T SAY THAT", someone else goes "hey yeah, they were a bit of a knob..."
Also, satire, people. Not intended as a personal insult. Intended as commentary on society. Yeesh. |