[Bouncer]

http://www.thenetworkadministrator.com/Steel%20Bolt%20Hacking%20Samples.pdf

Here's a sport for all you danger-and-adrenaline junkies. For a few dollars you can get a key-in-the-knob doorlock and use it to practice. A lot of these have at least one spooled pin.

Combination locks aren't necessarily better by orders of magnitude, either.

I remember a window sticker that said: "These premises are protected by Smith & Wesson."

Perhaps cunning and vigilance are the best deterrents?