This has happened to me on more than one occasion and sometimes I just say no. But recently I was on a jobsite with my husband (ceramic tile installation) and a young man who is the son of some formerly dear friends struck up a conversation with me. I had been respectfully avoiding conversation with him because I didn't know how he was feeling, but he took it upon himself to speak with me so I responded. I don't like to be confrontational with young people because they suffer enough. We talked for maybe 10 minutes and I don't remember the specifics of what I said.
But he wanted me to know that he felt the organization was wrong to treat DF'd and DA'd people so cruelly. Nice conversation, but it made me sad.
I think it is good to try to have a few words prepared in advance. Good post, I need to think it over.
Deb