the reason people are against it is, a user can bring a site down, and the site owner has no recourse. It's designed to protect the movie and music industry for the most part. But can also effect blogs that post content against the administration in power at the time.

I used to shut down sites for copyright infringement in the past.  It's fairly easy to do provided that you have proof of what you are claiming.  To have a site shut down just from someone accusing you seems to violate some constitutional law and due process.

I know would be sue as many as I could, if my site was shut down because someone lied and no one verified the information or at the very least investigate.  For people who make money with their website being shut down can be really serious and the amount of money lost along with a damage reputation due to a lie.

The entire things sounds as if it was made by someone that doesn't understand the Internet:  IT'S NOT LOCAL, IT'S GLOBAL and trying to enforce a U.S. law to a hosting company in another country has as much chance as all of us winning the lotto next week on the same day.