"The originally proposed bill would allow the U.S. Department of Justice, as well as copyright holders, to seek court orders against websites accused of enabling or facilitating copyright infringement. Depending on who requests the court orders, the actions could include barring online advertising networks and payment facilitators such as PayPal from doing business with the allegedly infringing website, barring search engines from linking to such sites, and requiring Internet service providers to block access to such sites."
The above quote is from the Wikipedia page on the USA's Stop Online Piracy Act (SOPA). On the off chance you haven't heard about SOPA, now is a good time to read a bit about it. Think about how, if passed, this bill could affect your activities on the Internet from a business and personal perspective.