One time I encountered a therapist I was seeing for substance abuse issues at an AA meeting. He was getting his award for 10 years of sobriety. I knew he was a former user and that he went to AA so that was no big deal. I tried to go up to congratulate him like everyone else did after the meeting, but he tried to ignore me and blow me off. I don't care if he wanted to invoke confidentiality. He simply didn't act the way human beings did to other humans. Although I had other issues with him, that was the straw that broke the camel's back. I dropped him after that.