Installer wants to know more about securi

I've starting installing alarms recently and I want to better myself and learn how to install better quality alarms. I wish to learn how to install alarms on high risk cars and suv's, for example escalades with several tv's in them. I have heard that Stun guns can disable alarms. I also heard that if someone uses a screw driver in the brakelight it would blow the fuse inside the alarm and thus leave the car vulnerable. I am not sure if these things work and on the alarms I have installed there has always been a fuse on the parking light output. Whats are some things thieves do and how can I battle against them? what are some resources I can use to help me?