Anyway, the whole idea that the state needs to operate in secret to perform its duties is ridiculous and only serves bad actors. Who would seriously wish for a secret police force anyway? Maybe we should be focusing on preventing and deescalating, through systemic and scalable solutions, instead of masked weekend warriors kicking down doors and shooting people. Also, if you want a laugh - here is a funny story about what happens when you allow the DEA to operate in secret: http://www.thisamericanlife.org/radio-archives/episode/540/a...
I don't know, that's not such a bad analogy. To put it another way, a key is just a really funny way to write down a bunch of numbers, and a key-lock is just a really esoteric number-pad.
People have actually broken into houses by cutting working keys from pictures they took of victims unlocking their doors—so it's not even obscurity aiding the security per se (or rather, it used to be, but then we greatly standardized the way key-locks work.) Instead, it's just concealment, like the concealed face of a credit card in your wallet.
Normal people don't have a moat.
A major reason that e.g. home invasions are risky (and thus are deterred) is that the criminal doesn't know when the mark or the neighbors will be away from home, what security may be in place or whether there is anything worth stealing. If you put that information on the internet for anyone then every time you come home from work all your electronics will be missing.
Replacing that "security through obscurity" with actual physical security is not something most people can afford.