I would like to commend you and the team for managing the AO website it is clearly a needed and well loved place for Adventists all around the world to communicate and share.
It is my understanding that this site is for Seventh-day Adventists only and I believe the reason and purpose for that is to protect Adventists from 'wolves in sheep' clothing' and to provide a safe environment for Adventist to share.
I am sure that behind the scenes there is a great deal of work monitoring and moderating however, when a person openly declares themselves not to be an Adventist, declares themselves to be a prophet with new light, and is affecting the faith of others, what is your policy, procedure, and practice?
As the man with his name at the bottom of the page you are responsible for ensuring that the basic purpose, vision, mission, of this website is maintained.
The non-Adventist I am speaking of is James French.