What do burglars do for a job?

My friend was released from HMP Kirkham recently, and told me an interesting story. Serial thief's get jobs as leaflet posters. They post food menu's and anything else that drops through your letterbox.All the time they are watching your every move. They are really on a covert mission to pick the best, and most vulnerable addresses to burgle. Allowing these people around is like giving an arsonist a box of matches.