This is one area where China seems to be both the leader and trend setter. I wouldn't be surprised if this isn't being discussed in Western governments within the next 5 years unless trend changes drastically.
I would be. Despite the attacks on privacy, freedom of speech is still alive and well in the US. Actual censorship is incredibly unconstitutional and would create a gigantic shitstorm.
The MPAA has gone after torrent sites, but that's very different from blocklists. For one thing, it involves actually shutting down the site so isn't really a viable vector for mass censorship.
automatic DMCA abuses showed perfectly well how with cooperating partners we are all screwed.