If someone is trying to learn your password from cameras nearby, they will make sure they can see your keyboard. Of course. If you're in that kind of hostile environment, nothing is safe except biometric or card authentication. Your concern is misplaced.
You should have raised the scenario of, say, spying on a screen through a window from the other side of the street. That's a much better example and in that one, you might actually have a point, although I understand it's against the rules in many organisations to allow a screen to face a window. But the "in the same building" one was ridiculous. Why bother brute forcing your squiggly coloured blotch when they can just put a tiny camera in every light, or whatever?
No, no further arguments. I agree it's a bad idea, of course.
