Participation list
 

There are a lot of "participant threads" mainly in the roleplay dares forum where you can reply saying that you're in as either a dom or a sub but often this leads to pages of people saying there in which means the people late to the party often get ignored so I'm saying the admins should add a participant list (togglable on creation of the thread) that basically works like the thank list there being a button to put the pressers user name in the participant list which then changes into a button to remove the name and vise versa maybe with the option on thread creation to split the list into multiple for different types of participants who on pressing the button get the option of what group or groups to join

Secondary reasoning
 

Why not use the thank list you may ask well aswell as my idea to add multiple groups to the participant list the owner of the thread cant thank there own post this makes sense but having a seperate list which the creator can join and leave at will also helps plus for those that do use the thank list (which might just be me) there's the off case of someone wanting to thank the post without participating and vise versa

This is not something that is currently possible.