I think there is this mythical belief that special techniques, tradecraft, etc. are only available to certian individuals who may have standing in the military community or a "need to know" basis. . . .What makes military special is they train, train, train and then train some more. If you want to learn how to defeat an enemy then the best tactic is to know an enemy.
Which is why I laugh at people who "Don't want anything to do with that VC/AQ/BadGuyOfTheDay stuff -- they're the enemy!" Right. And if I want to kill my enemy in the most effective and efficient way, I want to know how he operates. Not only that, but once you get past the "he's a bad guy" thing, you'll find they often have some very good ideas. Like it or not, some of the most innovative and creative people in the world are career criminals. Only thing that separates them from being say, a business mogul, is that they chose to use their genius for illegal purposes.
As Don pointed out, some of the best escape artists in the world are convicts. You can bet if I were training a force of people to be able to escape, then I would find the worst (or best) convict I could to teach the class.
Another oft-disregarded resource for not just escape, but full blown E&E is hobos. I don't mean street bums. I mean people who choose homelessness as a lifestyle and often, but not always ride the rails, sleep in abandoned buildings, etc. I knew one girl who had set up quite a guerrilla apartment in the hidden recesses of a commercial building. Even ducted some of the A/C and heat into her space, and ran extensions cord to have power and recharge her battery operated devices.
There is something to be said for simplicity as well.
Complex stuff is for the movies because it looks all spooky and stuff. Fact is, it's more likely to get your own guys killed. Some of the most effective "special" operations are very simple in execution. But going back to what Jeff said about military training, yes, we trained all the time. But more to the point, we concentrated mostly on fighting in the dark, in the raid, in the snow, etc. I.E. the operations weren't complex, we just executed them in a time, place and environment where it is very difficult to fight, and unless you train to do so, you won't be able to perform effectively.
That's the advantage of the military, they are paid to do nothing BUT prepare to do their job (whatever that job may be). A civilian has to hold down a job, have adequate time for family, etc, and simply doesn't have the time, or tax dollars to be able to train on a nearly constant basis.