DOIM says that GEN McCrystal's giuidance falls into these categories:
Adult/Mature Content, Alternative Sexuality/Lifestyles, Auctions, Chat/Instant Messaging,
Extreme, Gambling, Hacking, Illegal Drugs, Illegal/Questionable, LGBT, Nudity, Online Storage,
Pay to Surf, Peer-to-Peer (P2P), Phishing, Pornography, Proxy Avoidance,
Spyware/Malware Sources, Streaming Media/MP3s, Violence/Hate/Racism.