There are probably lots of badges, group members and other "profile decorations" that still exist that some users might have pnever seen before lol. The forum has wide range of these kind of things. Because there is no particular updated thread that explains all of this. 
Yeah you are actually very correct. The from has a lot of custom badges ranks and other profile tags too that are not all put in a particular thread. So far I think one of the most common tag is the teleported and that is actually because most of the members that are very much active here teleported from bitcoin talk and so they all understand what tag means.
To an extent I think the reason why most of these tags, ranks and even custom titles don't have a particular thread that contain all of them is because they were not all created at the same time it's more like admin creates them or implements them at intervals and sometimes probably skip creating a thread for them.
I'm crying, do my efforts simply go to waste when I update, create and pin these threads?
Ranks & membergroups:
https://www.altcoinstalks.com/index.php?topic=14162.0"Bad" groups (linked at bottom of above topic):
https://www.altcoinstalks.com/index.php?topic=180760.0Those are all the membership groups, those that are in use anyway. I'm surprised you haven't seen these topics already to be honest.
There was also previously "
Gangs of AltcoinsTalks and their rankings" pinned in beginners, but I haven't updated it properly in years.
What i mean is the full list of all this badges, group members in one thread describing/explaining its purpose.
The reason there is simply a list of badges, and otherwise topics for membership groups, is because the two are completely different systems. Badges is automated based on stats, and also self-explanatory based on the title of each badge. Membership groups are maintained by admins and mods, as part of a moderation system.
The confusing aspect is that membership groups have "badges", but these are not the same as the badges referenced in master list.