Besides installing an alarm, I was still worried someone will want my Spider more then myself. I like the alarm because I can activate it with the top down when I am just running into a store for a quick stop, etc. But we all know the problem with alarms in that usually no one reacts to them now except the owner and maybe the thief. What I came up with in addition to the alarm is this. I pulled the ground wire from the electric fuel pump. My car is Fuel Injected and will not start without pressure from the pump. I ran another wire from the pump to a switch on the interior and then to a ground. When I throw this switch the car will not start even with the key!