There is no such thing as absolute security. Even in the Internet, you are not completely safe. There are identity thieves, hackers and even just the slightly harmless stalkers. It is even much dangerous in the real world. You are dealing with hundreds of threats the moment you get out of the house. The threats could not be deliberate as it might be a case of a “wrong person at the right time”.  It is even more dangerous to deal with risks when you are inside the house. You just don’t know what can possibly happen with you and your family. Maybe spending a little for surveillance cameras might help. It is still more important though to be constantly aware of bad happenings.