[userbinator]

when you consider that just about every security system depends on proper behavior by trusted human beings, who are never 100% reliable

...and I think that's perfectly fine and IMHO required. I've long been a proponent of the philosophy that a little bit of insecurity is what keeps society in general from turning into complete dystopia; but unfortunately, paranoia and the search of "perfect security" is driving it in that direction.

In other words, striving for perfect security is treacherous precisely because humans are not 100% reliable. The same way you would probably not want "perfect" law enforcement by the government.