I agree that nobody should be forced to peer. But if a content provider is "flooding" an ISP, refusing to peer will just cause those packets to arrive via more-expensive transit. How bad do you want to spite Netflix?
Refusing to peer won't cause those packets to arrive at nearly the rate they were arriving previously, which means my network won't flood, which is less expensive for me.
I don't want to spite Netflix at all, I just don't want my network flooded.
(I probably also shouldn't have promised folks I could deliver all of these packets, either, but that's another issue)
