Yeah, it isn't shown anywhere. I think this is a possible UI improvement.
I think this is quite important to a site admin because I have no way of knowing which of the users I've added have completed the registration process. Without this, I don't know who I have to follow up on.
The solution seems straight forward (assuming the login date is recorded on object). a) no login date (user created but account not activated): user name displayed as red; b) user login at least once (activated user): user name displayed green. c) if user not logged in for xx days (might be important for some project managers to know their project members are checking in every xx days) then user name displayed as orange (optional - would need configlet to define the day limit).
I would like to investigate this:
1) could anyone suggest where the log-in date hook is stored? Simply look in the user object?
2) any issues to consider other than what I've listed?
3) This seems too simple to make it a full blown product; however, would like to offer it to Plone community. Suggestions on what form such a "product" would take to minimize development costs for me; however, to make it usable by the Plone community (note: I would only make this work in Plone 5)