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They don't actually block content. If you use your ISP provided DNS service then lookup requests for certain domain names will be hijacked, and redirect to a "This page done bad" website.
As the article states, actually blocking content requires snooping on content and that's not just expensive, it's legality is questionable. As such, if you want to torrent and whatnot, you are still free to switch to a public, unfiltered DNS service á la Google or OpenDNS.
A governing body for each continent controlling local policies like resource management and wildlife preservation, and whatnot, and a global governing body dictating global stuff like how much we must pay in copyright taxes and other such wildly important politics.
I'm not saying it's a good idea or not, but I can see it happening. We're already moving in that direction. Japan takes over Australia, Korea and the island nations, China absorbs India and all the other surrounding countries that don't particularly like China, including Russia once it collapses, Africa experiences a growth boom and becomes the new defacto place to be like China once was, European Union is already there, as is USA. South America just needs to stop fooling around and get on with it.