Either way, I think that a MOD should be the one to send the notification to the quarry owner because it reinforces to the outside world, ScubaBoard's position that everybody gets the opportunity to know when they are being discussed.
I don't know how Netdoc would feel about that but my thinking is that the mods are here to keep the peace, not to mediate in and/or position themselves in a position of mediator in conflicts.
Nobody's shop or instructor has been mentioned. If Offthewall1 judges that it's in the best interest of his colleague to be informed of the discussion then I have full confidence that he'll do that.
And as conscientious as people are on scubaboard, I'm sure that if the name of the shop gets mentioned that someone will fire them off an email long before any of the mods see it.
This isn't an official mod standpoint as I haven't discussed it with anyone. It's only my personal opinion.
R..