I've personally always been paranoid about shit like this even before I started growing, so I always have something on me to protect myself. Even hidden all over the house. I grew up in a rough neighborhood along with the "gangsters", some friends, some not. Guess it's just my built in nature to always be prepared and never trust anyone. Had no choice back then.
Someone tries to break in here there's going to be trouble. They just might leave with my plants, but they'll be staggering out and think twice about doing it again. I don't have a problem taking a mother fucker out and letting their body decompose on my floor while I have a bowl of cereal. It's all about protecting me and mine.