I found an actual list at the bottom of something that said everyone that was on the site. I can’t find it now.
Scroll all the way to the bottom and you will see who is on right now. While you are reading posts, look at the dot or ball to the right of your name. It is green, that mean you are logged in. Look at others, they are dark blue, not on at this time.
NOTE: Due to security reasons, the membership roster is no longer available.