if you think it's boring for the regular staff groups what do you think would actually motivate other people to sit in servers and irc and monitor the chat for a few instances of bad words being thrown around.

the system we have at the moment is pretty okay.
you see something you don't like on the forums? use the report button
you see something you don't like ingame? take screenshots and use the report board
you see something you don't like in irc/discord? highlight a moderator

honestly there's not really any reason to implement a whole staff group for this. imagine sitting down a looking at a computer screen for hours just to see if someone said a bad word or not.