Cory Doctorow has an excellent piece in the Guardian about how important it is that citizens question security measures, and not be punished for something like taking photographs simply because it might breach security (hey, if my photo-taking breaches security, maybe you ought to consider that your security licks ass). From the article:
We can’t rely on the authorities to defend us against attacks that outstrip their capacity to adapt to them. Remember, the same police force that’s plastering London with signs exhorting us to “let experienced officers decide what action to take” is the same police force that gunned down a Brazilian for wearing an overcoat, and shut down Soho when a Thai restaurant burned its chilli sauce, releasing spicy smoke.
Security literacy can only be acquired through continuous practice and evaluation. The more our society punishes those who question security, the less secure we all become.