So on some XenForo sites they have a little box on the left of the thread title when making a thread, where it drops down and you can click a thread title or "Prefix"
This could be used to organize forum games, debates, ban appeals, suggestion, whatever.
I do know that staff already have permission to use these as there are some threads with "Pending" and such. I suggest all users can have this but different types of prefixes.
Discussion:
[Video]
[Projects]
[Movies]
[Television]
[Competition]
[News] - staff only
Skyblock:
[Joining]
[Inviting]
[Selling]
[Buying]
Marketplace:
[Buying]
[Selling]
[Selling Ranks]
[Buying Ranks]
Towns:
[Alpha]
[Beta]
[Joining]
Media:
[Parkour]
[Arcade]
[Sandbox]
[Other]
Introductions:
[Leaving]
[Joining]
PVP:
[Teaming]
[Unteaming]
[Video]
[Event]
[Other]
Architecture/Creative:
[Landscape]
[House]
[Other]
And whatever else there might need to be...