This is a disturbing story in many ways. As reported to me, the Turkish website Ateizm.org has been blocked from access within Turkey by a court order obtained by a Muslim creationist. The site is still accessible outside of Turkey, though most English speakers (including me) would need a translation for it to provide any value to them.
A more detailed account of events from the viewpoint of Ateizm.org can be found here.
One disturbing aspect is that the founders of Ateizm.org are at a great disadvantage. They cannot fight this effectively in the Turkish legal system because they have what appears to be a well-justified fear of the consequences if they reveal their true identities. As the individuals responsible for the most extensive criticism of Islam on the internet in Turkey, they may well be targets for attack by extremists - and they are clearly in no position to hire expensive security for themselves as Ayaan Hirsi Ali is forced to do outside of the Netherlands.
It is, of course, impossible for me to comment on whether their site contains any genuinely defamatory material, which seems to be the rationale for the closure. Even if it does, surely the order must be massively over-broad.
More generally, the combination of violence from extremists and the ability of creationists and others to seek court orders alleging defamation is an unbeatable one-two combination. This could make it impossible, in practice, for any robust criticism of religion, or of fundamentalist teachers, to be carried out in Turkey.
Turkey's success as a modern, secular democracy has been seen by many of us as a hopeful sign for the future - the existence proof that a country can combine its roots in Muslim traditions with a commitment to modernity and liberalism. All of this is currently under challenge - evidenced not only by this incident but by many others that display the potential fragility of Turkey's great social experiment.
Read about what has happened here, and judge for yourself.