fuel pump cutoff? for the sake of time they will rip apart your back seat and just connect the fuel pump directly to the battery
if it's crimped under the seat they will just take out the crimps and place it back together, note they will most likely not take your seat out the regular slow way, rather they will most likely yank it nice and bent.
as for using your wiper switch, any kill switch should be hidden.
now if i remember correctly you have a 2000, which already has an immobilizer, which means that if they are going to get away with the car they will need i believe a 96-99 or replacable EMS to get away with the car anyway. cut your losses because anyone who is going to get away with your 2000, will be able to get away with it despite your best efforts
there is really nothing you can do to stop it and believe me with that ill switch it will just mean more damages to the car.
if i were to do eveything over again i'd have just a nicer alarm on my car and lojack, because then they will take off with little to no damage to the car, lojack will find it and you will be all set, VS me, i've been out a car for a month and a half for damages because of all the stuff i had in there to stop them after my lojack found it.