If the RIAA and MPAA want ISPs to filter unauthorized content and block "rouge" sites, Why doesn't the RIAA and MPAA start a zero cost filtered ISP.
Users would get free access to email, netflix, spotify, pandora, iTunes, Amazon and other authorized sites, but block access to ThePirateBay, block access to ISOHunt and RapidShare, block the use of Vuze, and all the other things they don't like.
Or even better. Start a cheaper unfiltered ISP and start making money off all the infringement users do anyway. I mean they already make money from unsigned artists who have their music on spotify by owning a portion of spotify. How would running an ISP be any different?