Handling bans from webchat

[hPerks]

From how Nadeko handles chat mutes, what you'd probably need to do is make the bot modify the permissions for each channel individually, so that the @banned role (or w/e) can't speak in those channels. You can make specific exceptions for specific people manually afterwards, if for example we allow [you know who] in #adults-only, just by adding his name above the @banned role in the permissions list and thus overriding the banned settings.

[hPerks]

You only need to disable two permissions for a chat ban: send messages and add reactions.