My (very small) company was moving a couple of months ago, and the place we were moving into wasn't as big as the place we were moving out of. Because of this, some stuff had to go into storage. I looked up a bunch of places, finally settling on one that had only opened its doors only a couple of months ago.
So my boss and I got in the car and headed down to the place. I was very impressed, it had a huge bank of monitors getting direct feeds from the numerous security cameras (Scarface-style), keypad access to electric gates, and a large bank of HDTVs which had a digital map of the facility, showing which units were taken and which were available, which were being accessed at the time, etc etc. Almost all of the units were indoors, and all were climate controlled.
My boss went over the terms of the contract with the reception lady, and eventually they signed the deal and the lady got to putting us in the system. We needed keypad access to open the doors, so she told us we needed to pick a 4 digit number to get into the facility. My boss picks one, and then the lady says it:
"Yep, that one isn't taken yet. It's all yours."
Doing a bit of mental math (10,000 codes divided by the roughly 600 units at the facility) I realized that perhaps some companies rely on the illusion of security more then actual security.