How about a new rank "Shitposter" that is skipped when ranking up, i.e. can't be reached by "normally" ranking up? But you can be de-ranked into it! This rank, once reached by enough shitposting with PowerGlove's proposal, would put severe limitations for those who become de-ranked into it. The details of such limitations are tbd.
I like it. Instead of saying the normal rank, it just says "Shitposter," after someone has written something like 100 meritless posts in a row. It would make it pretty hard to join a signature campaign. The special title could be removed after they receive at least 1 merit from 5 different accounts within their next 100 posts.
Quite honestly these all sound like April Fool's implementations, lol.