A young man moved into our block recently and we have had nothing but trouble since then. He has taken to leaving the communal door ajar. He sleeps all day and is awake all night coming and going. He does not work. he has pulled down 2 notices off the walls to say please close doors for security reasons. I wonder if you have a neighbour that does things like this.
Neighbours did not behave like this. But I think next time you should care for your apartment and your home. You should fix security cameras inside and outside your apartment. You should hire security guards for the security of all your homes. If you feel that there is more security risk then you also fix security grills. You can also read http://articles.org/how-to-remain-safe-within-your-home/ how to secure at your house.