kill switches car security

I would do a decent name brand alarm.  Why inconvenience yourself with a sequence setup?  Chances are, unless you drive a 90s Honda Civic if someone is going to steal your car it will be on a flatbed, they won't drive off in it.  Some good visual deterrents (like a flashing LED) will be more effective in the long run then an inconvenient sequence you have to do EVERY time you start the car.

Wow, and think of the issues if you ever have to valet the car......

When was the last time you "misplaced" your keys and someone used them to steal your car?

If a thief is trying to steal your car and they don't have keys they will most likely be able to quickly bypass your "sequence".  The only way I see it being effective is if you have a kid (or in my case a spouse) you don't want driving your car - they have access to the keys so a "tradional" alarm won't work. 

I know little things like putting my seat belt on and pushing "OK" on my navigation system every time I start the car is annoying - much less a sequence of events I must do everytime I want the thing to start up.

Does someone make a product to achieve what you are trying to do?  I've never seen one.  I've heard of people rewiring the car so that one switch has to be pushed (like the window up switch) but I've never heard of anyone doing a sequence.

Actually, they claim that after 32 years and 4 million installs, not ONE car has been stolen "by defeating a properly installed and utilized Ravelco".

They never mention anything about how many have been towed away. 

If you are that worried about the car I would suggest you look in to GPS based systems with back up batteries.  If the car is stolen you'll know exactly where it is.