A “code of conduct” or “rules” plugin to Mattermost would be dope, and could probably be put to good use by several communities.
In my mind, it would:
1. Add a “report” function to messages, which would alert mods in a private channel
2. Raise the visibility of server rules/Code of Conduct, similar to the rules onboarding in Discord
3. Maybe introduce a mod queue where reported messages (passing a threshold of reports?) are redacted until handled by a mod?