Abusive gym teacher??....?

25 years ago i had a verbally abusive gym teacher. She did nothing for our cl and was found by our principal one day sleeping on the field when our cl was supposed to be playing soccer outside. I am not sure how she kept her job. She seemed to make more of an effort the next year, but as a teacher and a person I still think she was pathetic. She particularly disliked my sister and I because we were shy and had poor social skills (we came from an alcoholic background) and not much experience in athletics. We were poor as well. Socially I suppose she behaved like one of the students. Joining in on the nasty jokes children say to unpopular kids. Although I am an adult now she made my life which was hellish harder and added to my daily burden. I have thought periodically about mailing her a letter letting her know that. I have just found her on facebook. I know she may well have changed her ways and that it was a long time ago. As we remember those that did their job well with us when we were young and vulnerable we remember those who had a negative impact on us too. I have thus worked for a school for twenty years with students and I particularly help those that are awkward. It is EASY to deal with those that are competent and self ured but it is my job to take care of all the students, particularly the ones that need help the most. That is where I get my greatest satisfaction. I would like to tell her that. I am not sure. Anyone had an experience where you have done this??? good or bad??