About 10yrs ago I worked for a company here in Portland that was/is an on-site locksmith service that served vehicles and homes. The "tool kit" for cars was a burlap bi-folded sack containing a three ring binder full of printed instructions, two small wedges (for prying the window out) and about 15 of these wires bent into various configurations. For each call I would just look up the make/model/year and the instructions would say things like "insert L-tool 5 inches from mirror, 8 inches down, turn 15 degrees, and pull toward rear of vehicle". Not only did they teach their prospective employees how to do this in a junkyard full of cars but it was incredibly easy to get a job there because of the low pay and horrible working schedule (on call 24hrs a day. 4 days on, 3 days off). No prerequisites, no drug tests, nothing. If you have a valid DL and can pop 5 cars in the junkyard after a quick tutorial, you have a new job. Pretty disturbing in retrospect.
At the time the ONLY, and I do mean ONLY, production car safe from this technique was the latest model BMW due to their proprietary "dead-locking" system. Basically when you hit the "lock" button on the key fob the locking mechanism would completely disengage from the pin keeping the door locked. At that point breaking the window and operating the interior lock with your hand doesn't even work. BMW owners were told by the company to contact their local stealership for assistance.
I had a guy throw a fit once when I rolled up in a '68 VW bug and popped his spanking new Benz open in less than a minute with what is essentially a thick bent coat hanger. That was pretty funny to me at the time.
The moral of the story is that this is not just info available on the web. Tons of people have been and are being taught these tactics and the "tools" they use can be made by anyone with access to a closet. Remember that the next time you consider leaving your FX somewhere sketchy.