I have a seat phone so if I get a call from a number I don't recognize I Google it to find out its history. Then if it's no one I know I just add it to my blocked caller list and I never hear from them again.
Security system for my home? I don't have a home. I live in my car and I already have a car alarm. Hello? Hellooo? Helloooooooooo?
Damn, Habib hung up. ;-)