There are many reasons for this kind of behavior. Some people act this way because of their own emotional conflicts or short commings. You may try to be sympathetic to these individuals and
lead by example by showing patience and understanding. You should create healthy boundries as well. Even though you might want to show patience you must also be assertive( not rude) in letting these people know when they have crossed a boundry that you are not comfortable with. You should never put yourself in danger; if you become fearful, remove yourself from the situation or seek help. These people may also have problems that need professional analysis. Be safe.