Personally, I think the doorslam is a very ego driven response, kind of like feeling one is always right. I think the doorslam is very different than letting people go who are harmful to you. The former is more dramatic and self-centered, like slamming the door to your bedroom because you are mad your parents won't let you go out with your friends. I recommend anyone, regardless of type to move beyond such things. The doorslam is not very constructive and is filled with anger and resentment. Close doors if you must. Move on if you must, but give room for people to reenter your life after they have changed or developed. We all were less mature than we are now. Other people are no different.