Something

on *:JOIN:#: {
  if ($nick == $me) && ($read(%chan_blacklist, w, $chan)) {
    msg $chan 4 This channel is blacklisted! send oliver a memo to get unbanned - /ms send oliver (msg) 
    part $chan
  }
  else {
    if ($nick != $me) && ($me isop $chan) || ($nick != $me) && ($me ishop $chan) {
      if ($read(%nick_blacklist, w, $nick)) || ($read(%nick_blacklist, w, $address($nick,2))) {
        /ban -k $chan $nick 2 4 $nick is globally banned and will be banned on everychannel im on until removed
        /notice $nick you are globally banned and will be banned on everychannel im on until removed
      }
    }
  }
}