The SOPA and PIPA bills are not only ludicrously poorly-written, they're ineffective. They will throttle the free and open Internet. Find more info here:
EFF: https://www.eff.org/sites/default/files/One-Page-SOPA_0.pdf
Reddit: http://blog.reddit.com/2012/01/technical-examination-of-sopa-and.html
DYN: http://dyn.com/sopa-breaking-dns-parasite-stop-online-piracy/
EFF: https://www.eff.org/free-speech-weak-link