My 2 cents worth on the subject. I posted in the hello, and got some immediate hellos and feedback. some folks asking if I know Stoo since he's from my neck of the woods, and others specifically to my request in the post about feedback on ribs for diving, etc. Very useful suggestions with people directing me to others also into diving.
In terms of sarcasm etc, I respectfully observe that as a Canadian most of the local dialect sails right over my head!
sure there are some snarky comments, but its a group, and as somebody observed written text without intonation and body language can be a challenge.
I've briefly checked out the facebook group, but as was observed the timeline nature is a PITA to do much more than keep up on current issues so I don't find the format of it so useful.
I think as John has suggested if people are uncomfortable they can PM him directly. So far I've seen nothing to suggest that he would not tackle poor behaviour from a specific interaction, and I would suggest that this is the best way through it. Army taught me a long time ago praise in public, discipline in private.
As to the suggestion that admins have a fixed 2 year term, the challenge with such a public forum is you aren't likely to find folks who will keep things up on an ongoing basis once you've kicked the first round of volunteers to the curb
Perhaps though, and I assume this would be perfectly acceptable, if somebody wants to nominate a person as admin (or volunteer) they can approach John directly?
Personally I have very little free time outside of family and work, so finding a resource like Rib.net really helped me with my purchasing decision. other sites like Hull Truth also gave me lots of info. If I grow tired of behaviours on a particular site I could try and fix it (legitimate option if I am invested in the community) or carry on to a better forum. I think if you want to fix it, then take advantage of John's offer to make suggestions, or quietly carry on and leave those who do enjoy the forum to continue.