Unnecessary, all you have to do is look at the River to see who posted.
Unless this is another attempt to call out Trolls, in which case...Still unnecessary.

I bet it would stop people from throwing out all those unecessary unhelpfuls about things you know shouldn't be taken so personal. Of course, then there's those who would still throw out the unhelpfuls just to tick off certain reviewers and it might cause some futility in here. Ah, come to think of it... who needs it?

Not necessary.Just read the "recent reviews",or are we obsessing about Trolls again?

Not pressing, but a listing of other members currently logged into the site would be kind of nifty. Just the other day, I received an internal message prefaced by a question to see if I was still on the site. Not a big deal (of course), but if the info was already available, the question would be unnecessary. In addition, such a list would be helpful to see peak times of activity and see prime candidates for near real time messaging. These are just a few advantages that come to mind, and I'm sure there are others.