The right to life. If my life is taken while Im sleeping I would want the killer to be punished for his crimes in the aftermath.
Private security firm? Really? So only the wealthiest should have the privilege of freedom?
And yes avoiding trouble is indeed a personal responsibility. But that will not always protect you. Everyone needs to sleep. Everyone lets their guard down at some point. A functioning society in my mind is not a society where you are constantly afraid and holding your finger on the trigger.