If no-one had curtains, blinds or nets in their houses there would be less crime. You would be on display to your neighbours whenever you were at home but so would burglars trying to steal from you. It would make domestic or child abuse more difficult to hide and reduce the number of people taking illegal drugs.
So do you want to be on view 24 hours a day to make the world a safer place or do you value your privacy more than that?
