Doesn't matter. Due to the legal blockades in the UK, if you label ANYTHING you don't like as defamation, it must realistically be taken down. You might think you have the freedom to criticize your local government and their policies, but all they have to do is claim that your criticisms are libelous and you are in a world of hurt if you refuse to back down. The same applies to a church, say of Scientology. Or any other ridiculous way that those in power would like to keep down the voice and will of the people. Another tragedy of free will from the UK. I hope America learns from its mistakes before it's too late.

Unfortunately, although you may be technically be right, it doesn't help that the link you provide clearly shows a level of security above 'Top Secret'. Claim that SCI is just a subset of Top Secret all you want, but the fact remains that there are programs out there who's classification level itself is a secret, so if you're not only not allowed to know that the program exists, but also not allowed to know how secret it is... that might be above knowing that something is 'Top Secret'.