A lady named Paxton Quigley wrote several books dealing with this subject. Her books will tell you how to keep a wall of safety between your personal life and your business/work life. I have several copies of the book Armed and Female that I have passed around to my family members to help them educate themselves on making a game plan for personal safety.

Women have an intuition that will help them if they listen to it. The fact that you are aware of this potential problem makes you better off than most. You, rightly so I believe, were not very specific about the details so I cannot offer detailed advice and would be hesitant to anyway. But can only suggest that you spend time learning about what is needed to insulate yourself from these types of people. What methods of offence or defense you chose has to be a personal chose that you could be comfortable living daily with. What ever you do don’t put a Band-Aid type fix on this. Safety is a life time learning process.