Showing Joined Date

From PluginWiki

The plugin can show you when members joined the group. You configure this from Features > Advanced Options:

The information then appears below the member's name:

If you put in a number of days, then the date will appear red if the member joined more recently than that.  For example, some groups don't allow a post until you've been a member for more than a certain number of days.  You can also use this to help you look more carefully at posts from new members, because they're less likely to be right.

You can change the Joined Date Format.

If the member isn't in the group any more, then you'll see it say Not a member.

This can validly happen - for example, some people join a group to make an offer, then leave it. Or you might be looking at old messages.