Tenants can play a major role in helping the landlord secure the building.
If the person continues to press your button, tell him that you will call the police. This only takes two seconds, and it can save your life. If someone that you do not know is walking behind you as you are entering the building, there are two things you can do. One is to very politely close the door and ask him to buzz the person whom he s visiting, or you can make believe that you forgot to buy milk and head for the nearest delicatessen. If they do not respond in a timely manner, threaten to start a rent strike.