They already want to make a special type of dns system.
DNS= DOMAIN NAME SERVICE(or SYSTEM) ..basicly it turns your domain name google.com to a computer address called an internet protocal address, IP for short.
What the US wants to do. Is create master DNS servers that make sites disappear if they are found to engage in piracy or something its laws don't like. It will install these on all data pipelines going in and out of the country.
I am not even sure about access going into the country for there sites. There is already content filters on certain sites if your not from the US. EXAMPLE hulu.com would not let people from Canada watch Saturday night live online.
Then to police the rest of the world the US would use it trade and economic influence to put political pressure on countries to play ball. EXAMPLE Canada is a major trade partner. If they wanted to make sure we are on ball they just have to put pressure on our puppets err I mean politicians and they would go with the money.
How long ... wait till the next american election. The current prez is alright, and seems reasonable. Its the republicans that will be doing this.