I'm not sure I understand the point of the article. Security through obscurity does work in the sense that it decreases crimes of opportunity (I'm sure this is true even in the world of IT). Obviously it doesn't prevent someone who is motivated from getting in, but I don't think any reasonable person would suggest that it does. Does having a lock on something decrease your chance of having it stolen? I think the answer is: Absolutely, yes.<p>If you don't believe that security through obscurity is effective the following experiment should easily be able to confirm this: Place a couple of expensive bikes propped up on the street in random locations around town. A day later repeat the experiment, this time putting a lock on the bikes. Now I'm pretty sure no one is actually going to perform this test, precisely because the outcome is so obvious.