Thank goodness all those oppressive dictatorships didn't know that they could outlaw revolution. Otherwise, everyone would have just sat around twiddling their thumbs because, "Well, it's illegal!"
The fact of the matter is, no one other than a few crazies on the internet think the UK is a tyrannical state. If it really was, you would have unrest similar to actual dictatorships, like Syria and Libya. You wouldn't be able to type out your conspiracy theories, because the internet would be shut off.