[matt_st3 (Strongrule)]

Or i could have a community ban rank to differentiate...

I actually don't mind having this.
So you have a subsection called Forum Ban Appeal where someone with a banned rank can post a thread under moderation until someone who runs the forums/you approves it to not be a shitpost. Those with Community Banned rank can't even do that.
Granted that's like a "it just came to my head" thought though so take it as you will.
Either way I am personally glad to find more ways for people to engage in a larger scale in the community other than just inciting/fighting drama.

Implemented. Currently it doesn’t moderate - I may tweak that but it was being a bitch in testing on the phone. Community banned has 0 perms, and regular banned can only post in their own unban threads.