I'm also curious where the line should be drawn as there is plenty of information revealed in MERB reviews that is not publicly shared by an SP or, if appliable, their agency anywhere. Often it is information that is arguably fairly innocuous (e.g., "she doesn't do DFK"), while other times it's clearly over the line (e.g., "she attends XXXX university and studies XXXX and lives in the XXXX neighborhood"). And then there's much that exists in a grey area.
I think you answered that on your own. If it’s something job related it’s ok to share privately or post on a review. If it’s something personal that she specifically told YOU then it’s not ok to share. It’s happened to me earlier this year, a man wrote a long review about me and posted a lot of very personal details. I consider myself lucky because other than that, I haven’t had any bad experiences but this made me felt violated.
If you share a nude a SP sent you then that’s not only revenge porn but that’s also breaking trust.