There have been numerous complaints to Twitter about terrorist sites, but Twitter refuses to take them down. Not only that but they actually encourage the practice of people using terrorist Twitter sites. Bridget Johnson of the PJ Media reports that after checking mout a terrorist site and "following" it, she began to receive suggestions from Twitter for other terrorist sites.
While Twitter does close accounts depending on content, they stay oipen long enough to tweet 50 to 60 messages, including violent ones and the groups have no problem opening another account, even after such violations occur. Al-Shabaab is currently on it's sixth account, despite it's many tweets that violate community standards.
Johnson, like many reporters, decided to "follow" the newly announced Al Qaeda account and soon was receiving messages from Twitter, suggesting other terrorist sites.
The first site Twitter suggested was, “Islam Workshop,”, which offers to rouse believers. On Saturday, Twitter removed a clip of film showing Al Qaeda and a group of the Muslim Brotherhood fightiong Egyptian troops in the Sinai.
The second link apparently referred to Al-Battar training camp, and it concentrates on bringing like minded groups together into a loosely held network.
The third also takes you to another Al Qaeda affiliated link. It is a Kurdistan based group.
The fourth claims to be a foot soldier for Al-Shabaab and it has a clip of the Westgate battle.
The fifth one is of a former Gitmo detainee, Abdulaziz Sayer Owain al Shammari, who uses his account to document his exploits.
Twitter says it cannot comment on why they allow terrorist postings to remain up. And most of the cases, where they have removed a site is because of intense pressure from it;s other users, which seems to suggest, they want to keep them up to raise their numbers.