>>1, This would have been more informative if you'd included information on PIPA in your OP, since the two of them are so closely related.
As for my opinion on the two, SOPA and PIPA are two of the most ridiculous things I've ever known to be suggested. As if the fact that 2/3 of the internet (almost all of your favorite sites) will be shut down or censored beyond recognition, the combination of the two allows the US government to shut down a website under suspicion of piracy or copyright infringement. No proof is needed to shut down your radio station, or blog, so they can instantaneously make your site go black. But it takes months to prove your innocence in court, and by the time your site is up and running, you will have lost all credibility with those who used to frequently visit, making your hard work collapse anyway.
As for the piracy, I'll admit to reading manga for free, and ripping un-buyable music from YouTube. I post copyrighted images on my Facebok wall, and reblog them on Tumblr. So I'd be slightly upset about those disappearing as well. Not to mention the fact that all of those websites would be terminated.
In general, if the laws were passed, I'd be pretty pissed. I can't imagine the chaos that would erupt from the rest of the country as people begin to scream "OH NO! MY INTERNETS ARE DEAD!"