A homeless charity has branded a business responsible for a security system that barks at people in a doorway and threatens to call the cops as 'sad'. The bizarre alarm system is triggered when passersby step into the sheltered doorway of an office block in Glasgow. When set-off, a loud voice blares through the speakers, saying: "You have been detected in an unauthorised area, please leave the area or the police will be called - CCTV is recording". A pressure group has also slammed the security measure for being 'heavy-handed', 'aggressive' and 'intimidating'.