Not having a universal state of 'banned' and 'unbanned' across the protected rooms set is an inconcistent pita.

[Gnuxie]

I'm trying to track membership of the protected rooms set as a whole. Like whether you are in at least one room in the community, and I also wanted to be able to keep track of who was banned (for reasons like ban appeals and introspecting on policies) but we can't easily and efficiently do that when you could be banned in some rooms and not others. A real mess. Probably not something we can sort out until the appservice gets improved.