Several months ago, a member volunteered to guide people through 'experimental protocols' which means new exercise programs. He was interested in seeing if his ideas would bear fruit - if people following his suggestions would feel good, get stronger, etc. And to support him, I created two private sections on our forum - admittance was given via group membership that had rights to those places. Perhaps 15-20 people took part, and each person created a single thread for each protocol they followed, so one thread for most people but two or three for some. People in the group were allowed to read and contribute to each other's threads, asking questions, offering comments, advice, etc.
The author of the protocols is now interested in writing a book based on this experiments and other things. Our organization is in support of all this - the book will be his, not ours.
He, the author of the experimental protocols, has asked me to close the forums to further contribution and also to viewing by anyone but him and his co-author, and my quandary now is how to handle the members of my forum who participated. Specifically:
Am I within my rights to simply close access to the 20 participants? Must I give them warning? Can I, should I email each of them the contents of the thread they started? Can I deny them access to content they create in their own thread or the threads of others?
Thanks in advance.