You might want to check your server setup. If the server is set to allow people to play on the LAN, then PB cannot be enabled. If you disallow LAN connections (no idea how...), then you will be able to use PB.
Our banlist is easily updated manually, and as for the MCI checks - you can still use those as IceMan said, but they would just kick, not ban. :)
Hope this helps :)