I think this is being made way too complex. Rule of thumb, don't post anything about someone else you wouldn't be willing to sayto them in person. The same rule applies to what you say about others with them not around. Then, if something does get back to the object of your commentary, you can stand up and say, yes, I would have said that to your face, but I was processing how to say it. This is one of those areas where life really is simpler than a lot of people make it.