This is my thought newer vehicles get stolen all the time. Hopefully in a Zombie situation people would leave there keys in their cars, but if not and you had to get out of somewhere I believe it would be a good thing to know. Just even if you were driving in the mountains, camped out and forgot your keys and your spare is not where you thought it would be.. Yeah you could camp out for a while, but having the knowledge to hotwire your own vehicle could be a life saver.
Once again I don't know anything about this and do not believe anything I see on Youtube or most other sites. I own tools to unlock vehicles and houses so that my friends can call me when they are locked out. Worked really well when my wife's friend lost the keys to the house she was house-sitting with dogs. Have unlocked many new car doors with higher security systems. Pretty easy when the tools are labeled by manufacturer and a guide.
I do not know any toolkit to hotwire cars or some "Gone in 60 seconds" air key tool. (That was pretty cool though) Also with most vehicles having a chip in their key makes things more tuff. Although I have found most vehicles still work 100% with a un-chipped cut key.
I would love to take a hot-wiring class...