From the day I joined DP I am seeing Group Memberships column in every DP Member's profile but Never saw anyone a Member of any group Would like to know from Shawn and other mods how to join or create Groups ?
Groups/Membership can't be created by any of us, those are more commonly known as "Usergroups" only made by shawn himself. And i dont think dp needs more usergroups.
They're a standard feature of the forum software used at dp. However groups aren't used, so don't fret, you are not missing out on anything.