I agree (in principle) with Patrick. However, the idea for this "forum" is to give ideas on what others have done. When I wrote the Technical Reference section on alarms, I didn't go into the specifics as to what I've done to my car. IT'S NOBODY'S BUSINESS!
I think that the "Club" is overrated and the prior post gives a good reason as for why.
The "shocker" club is a neat idea, but I bet you could get sued if he has a heart attack. (think I'm kidding? I'd bet that's why you can't but "threshold of pain" noise generators for the interior of your car! They were available for a while.)
Coil kill switches do nothing other than make the thief spend more time. It may be a deciding factor if time is tight, but if they see you go get in line for Star Wars, they know they can play around for two hours. Heaven forbid they tag your car when you are going into Disneyland for the day.
If I was the thief, I'd bet that the "kill" switch is within reach while sitting in the drivers seat. Put it somewhere else!
As far as mounting the "unit" under the dash, mount it somewhere else (I did). You could mount it in the trunk (not where I did) and run the wires up front. The trick is routing the wires where they can't be gotten to. In other words, not just under the carpet. The door sill cavity runs the full length of the car. (hint, hint) This is NOT an easy location to run wires, but it's even more difficult for a thief to realise that they are there. (of course, if the unit doesn't have a remote antenna reciever unit, the location is given away by seeing the antenna)
For those trips to Disneyland, get a battery disconnect switch (Summit has them for around 20 bucks), and then make it so that the hood can't be opened. When you get to the park, open the hood, turn off the car, then lock down the hood. (I don't care if my date thinks I'm paranoid! How would she like having to call for a ride home at 1 in the morning?)
If using a battery disconnect switch, make sure that it doesn't turn off the power to the alarm! Put a fuse (or circuit breaker) on the alarm feed line that is only big enough to run the alarm. That way, they don't have enough current to run the starter! (on my car, with the rest of the car turned off, the alarm works, can lock and unlock the doors, and roll up the windows)
Could a thief get past my alarm and take my car? SURE. But the only way he could do it fast would be to show up with a tow truck. It's all a matter of making him spend his time!!!!
Then we could talk about "back-up" batterys, but I've got to stop somewhere.
Wes. Vann