Negative energy

All human beings have positive and a negative energy. Postitive is- when you meet someone, you get warmth and a feeling of calmness from them. On the contrary, when you meet some one with a negative energy, you feel uncomfortable. Sometimes you are in touch of someone who has negative ORA arround them; you can feel that strong negative energy coming out of them. What do you do? I know , some of you might say, " just walk the opposite way." But sometimes, it's not easy. Our cultures teach us to have patience, be humble and kind, and don't disrespect others, but what if the other person is truly an evil entity, what would you do?

How do you guys avoid someone, especially, if they are your relative and your parents have adviced you to always "wish them" when you meet them. You see them at every family gathering and functions, and you just can't stand them. What if you want to cut all the bonds with that relative? is it okay to pretend in front of every one that everything is okay, when your heart and mind are telling you to do the opposite?

Why can't we just go to that person and say ," I don't approve the ways you have lead your life; you have given tremendous pain and discomfort to many people around you ;and I don't want to know a person like you." Would this be wrong to do?