I honestly don't know how to handle situations like this.
I don't think anyone's departure reflects poorly on the group. That's not even remotely fair to all of us who don't even look in on the threads in question. Even for those who do, I don't think it's really up to any of us to attempt to police the site, drum out offenders, whatever. We are all adults here and should know how to resolve arguments amicably, or at least to the satisfaction of those involved.
It is a big loss when anyone leaves, especially so in the case of someone like Wayne, a deep thinker about golf, gca and, as Tom P says, one of the most generous members of the site. I really only know Wayne through the site, yet I'm proud to call him a friend, and I hope he feels the same.
I can only hope that when someone chooses to leave, he takes some time to reflect and realize there are still a lot of good, solid people out there who are the ones losing out when someone else leaves.