want to piss someone off?
Use allen and security bolts everywhere. Use a good grade that way you cant just drill them off. Alternate where you use them. IE if the amp is held down by 4 bolts, use 2 different bolt types on it.
Get some steel security cable. It can be cut with the right tool but if you hide it well it would be a major ***** (crimp on a loop or get cable with a loop in it already, bolt that to the amp, use loctite, epoxy, weld it, whatever it takes. Do this to the sub box also. use a short run of cable and hide it behind carpet. That way even if they manage to unbolt the amp the amps/box wont move far.
Backup alarms are a must. If by some magic they disable your primary alarm you should have at least 1 BACKUP alarm. In reality the more the better. How about 10 piezo sirens going off all in the trunk? Hide them well, make them impossible to get to. I've seen someone encase a siren in epoxy on the sidewall of his trunk. Looked like a big mess under the carpet but you could not get them up easily. Good luck shutting them up. The only way to kill them was to pull off all the carpet and alot of trims, remove his rear seats and more trim, till you finally got to where the control modules and batteries were hidden, also in epoxy. He had a keylock kill switch there.
Weld a steel frame that cant be removed without cutting or removing heavy gauge locks. For added benefit encase things in an plexiglass case attached to the inside of the steel frame. Good luck removing or GETTING to anything when its behind 1/2" to 1" plexiglass and locked up tight.
BTW. Tasers, Electrifying your car, Razors, Anything that can cause real physical harm is illegal. It's considered boobytrapping and that's very illegal.
By the time I'm done with my system it's going to be heavily fortified. The most they'll be able to do is smash my carpc's touchscreen up front, or wreck the front components. That is If they manage to get into my car. I already have Piezo's hidden throughout various parts of my car. Once I get to installing my alarm I'll be adding backup circuits.