They are often prepared to deal with dogs. If you hear a prowler, turn on all outside lights and call the police. Alert your neighbors. Keep curtains closed and shades down at night. Beware of casual acquaintances who visit unannounced.
Many rapists know their victims and plan the time of the attack.
Ask for identification of all service personnel before opening the door. If you have not requested service, ask for the office phone number and name of dispatcher. First validate the phone number by checking it in the phone directory, then call the office to verify employment. If you have doubts, do not open the door. Do not allow children to open the door.