Though I have not had that exact kind of experience, I applaud you for your honesty with the guy that made such a mindless mistake. That's why I have 5 e-mail addresses
. These days there is no such thing as being to paranoid about privacy.
I did however frequent another pay site forum, and ran across more than a few people who used the '(color) invert' filter to obscure their identity. I usually sent them a message saying, "hey all anyone has to do is invert it back and your secret it out." No thank you's, but I felt I did my good deed for the day.