Heard of SOPA? It's a dramatic SOAP-opera (wordplay intended) on the decision to seriously shut-down and/or censor websites that promote piracy and/or websites that damage businesses' intellectual property.
The US is considering laws to stop all of these, calling their new legislature the Stop-Online-Piracy-Act (SOPA)
Internet giants like Yahoo, Youtube, Google, and Wikipedia have opposed this. An open letter by all of them stated that SOPA, if made into an effective law, will allow the US government to censor the Internet, much like countries like China, Iran and Malaysia.
So what does this mean? Any website and their owners can be sued and then shut down if it flouts copyright rules.