I like the idea of customizable titles. And i think it’s something any mod can do.
I’d probably opt for a simpler system. Any poster who meets certain criteria (been here for a while, posted at least so much in the past year… just something to prevent random socks from entering the queue) could go to a “request a title” thread and ask for one. Any mod who was bored and looking for a way to suck up to posters could start at the top and grant some titles, editing the request posts as they go so it’s clear where the current top of the queue is. Or better, have two threads, one for open requests and another for completed requests, and just move posts from one to the other as they get processed. Then it would always be easy to find the “top”. It would be the second post. (Right after the initial post explaining the point of the thread.)
No guarantees, and mods might reject certain requests. But i expect most requests would be uncontroversial.