China

The People's Republic of China∞, everyone's favourite communist superpower, operates a major firewall known as the Great Firewall or the Golden Shield∞, which blocks political, religious, and pornographic sites. Its effectiveness varies dramatically from ISP to ISP and state to state, implying that ISPs run their own filtering as well as the state controlled blacklist, which is the result of ambiguous legislation creating a climate of fear and self-censorship, and in 2005 Freenet 0.5 had the honour of being blocked by Golden Shield (at the sesssion bytes level).