When did I ever say or imply that? I agree that intelligence agencies are draconian, but to imply that you'd be locked away (never to be heard from again) for pointing out that a substation could be bombed and cause power issues is ridiculous.
So, I guess I really don't understand your point. That being arrested for pointing these things out isn't bad because it's not being disappeared?
But for saying there is a single substation that, if taken out (by sabotage, terror attack, arson, or whatever), would cause great embarrassment and economic damage to the country by disabling THE British Airport? I think that’s a whole different matter.