My biggest problem with Facebook is that my contact details are uploaded to Facebook by my "friends" without my permission. I choose not to he Facebook user bu

My biggest problem with Facebook is that my contact details are uploaded to Facebook by my "friends" without my permission. I choose not to he Facebook user but people I know are persistently sharing my contact details with them and I assume even my contact details photo which they can later match using facial recognition to other photos uploaded by friends without my permission.