Just because he signs a message it doesn’t prove anything. I could do something bad, claim I was hacked & sign a message from an address owned by me, linked to this account since 2014. What does that prove?
Don't be rude again. He is your friend and seem to be a good guy with no intentions to hurt you. It's better if you believe it was not BitcoinGirl.club who dumped those PM or something.
More important thing is you actually sent those PMs to user's to use your DT privileges to protect a casino and you even act blindly on flags yet being a DT1 ( you should check my explanations again ). You being an arrogant freak is harmful to the DT overall.