and from a technical standpoint, most of those websites listed use CDNs for static assets, so unless you list the constantly-changing IPs of akamai and other servers for all of the weird random-looking hostnames used by those CDNs, many of those sites will not even load to a usable state. (and porn sites? really?)
also, from the reddit thread:
As some posters suggested, you can use another DNS server. The two server I'm reasonably certain about are OpenDNS and Google DNS. Both of them are US based but I think Google will move it's server to Europe if SOPA passes.
using a resolver in the EU from the US would be frustratingly slow due to the latency. you're better off showing users how to setup their own caching servers to bypass their ISP (i've always run my own caching server just for technical reasons).
and do you really think google cares about SOPA? they have done practically nothing to stop it; no notice on their homepage, no public awareness, only one legal representative sent to the preliminary hearing, etc. this is the same company that partnered with china and supported their censorship just to make some additional ad revenue.