This is a very clear and straightforward explanation about how flawed the proposed SOPA and PIPA bills are (this is a matter of USA politics) - by one of my favorite internet gurus - Salman Khan of Khan Academy.

One thing that he didn't mention, but which became clear to me while watching the film, is that fundamentally, the legislation is designed to make the USA like an ostrich which sticks its head in the sand and thinks he's hiding that way. It's kind of silly. If offending foreign sites aren't accessible to US citizens, they're still accessible to the majority of other human beings in the world.