I wrote Christian a PM explaining what was going to happen in regard to NFW's forums and let him decide on his character's exit from the fed. I also made it clear I'm not further engaging him via PM or on the boards around this incident any further as I explained myself, whether he chooses to believe my reasoning or not.
Should he choose to pursue this egregiously outside NFW's forums, I let him know that I will let the admins deal with that as they see is best. I truly don't anticipate this going any further based off his response and see he's updated his IWF bio accordingly.