Kill switches
 

Does anyone have a kill switch hidden somewhere in their car to go along with their alarms? I was thinking about doing this as a second layer of protection.

It's not that common unless you live in an area that has a lot of car theft. But if a thief wants your car, there's nothing short of a miracle that will prevent them from getting it. Alarms and kill switches can be bypassed if the thief knows what they are doing.