http://lofgren.house.gov/images/stories/pdf/042312%20lofgren%20cispa%20concerns.pdf In a nutshell, civil liberties group, privacy rights groups, etc like Electronic Frontier Foundation, American Library Association, Ron Paul, American Civil Liberties Union, Tim Berners-Lee (the inventor of the World Wide Web), Avaaz, Access Now, Center for Democracy and Technology, Free Press, Canadian Internet Policy and Public Interest Clinic, The Constitution Project, Techdirt, Reporters Without Borders, OpenMedia.ca, Free Market Coalition, Open the Government, Privacy Rights Clearinghouse, etc are against it. Big corporations like Facebook, Google, Microsoft, IBM, AT&T, Lockheed Martin, Boeing, Intel, Oracle, Symantec, Verizon, and many, many others are all for it. My father has always said if you want to know the intentions of someone, follow the money. Non-profits are against it. For-profits are for it. Why... More reading: http://www.guardian.co.uk/technology/2012/apr/23/ron-paul-cispa-cyberterrorism-bill http://www.forbes.com/sites/seanlawson/2012/04/23/are-all-cispa-supporters-what-they-appear-to-be/ http://www.digitaltrends.com/web/cispa-supporters-list-800-companies-that-could-help-uncle-sam-snag-your-data/ https://www.eff.org/deeplinks/2012/04/voices-against-cispa http://thehill.com/blogs/hillicon-valley/technology/222109-overnight-tech-privacy-groups-unimpressed-with-cybersecurity-bill-changes http://en.rsf.org/etats-unis-internet-advocacy-coalition-16-04-2012,42283.html http://en.wikipedia.org/wiki/Cyber_Intelligence_Sharing_and_Protection_Act