Darren is right, a blade is much more effective in close quarters.
Midtown is also right, step into the mutt and start punching. The mutt will never except
you to do that. Close quarter work is best, a knife comes as a real suprise. You need it in hand though. Stick it in and pull up.
As for the kid car in IL. Most States require you have the weapon and ammo in different locations and in a locked box. Glove compartment is not a locked box. So yes the kid is going to be under arrest. Even with a CCW, you will at the very least be held for questioning, if I have to discharge my weapon, I am in for hours of paper work and exam by internal affairs, not to mention a possible Grand Jury inquire. Please remember you life must be in direct danger to use deadly force. That doesn't mean the guy running away from you. Please have good attorney, you will more than likely need one. The NRA can provide you with a list of names in your area.
The kill switch is find as long as you are not there when the car stops running.
The mutt may destroy you ride although because he is pissed.
Marking the glass is fine, but once it is across an international border, Like South America the middle east or eastern Europe, Title means almost nothing. Take a look at the impound yard in any Mexican border town. If you get it back, it may be years and the is destroyed. Best thing is good insurance with a declared value.
Good luck Gentalman.
Thanks for your time
Russell