Given the fact that Ergun has filed a lawsuit, he now has the ability to subpoena e-mails, facebook messages and any other communications. Accordingly, I would encourage you not to send any messages unless you are comfortable with Ergun reading them.
Update: In the initial settlement discussions Ergun demanded all my private communications about him along with non-disparagement agreements from myself and my wife and children. I refused. At the time there was about five more people that Ergun was threatening to sue. I wrote this post in order to keep well meaning people from being sued or otherwise retaliated at by Ergun for their thoughts about his honesty in sermons and lectures. Ultimately Ergun lost and in exchange for a settlement Ergun has agreed not to sue Jason and I for anything that happened prior to 2015.