Something

on *:TEXT:!blacklist*:#: { 
  if ($nick isop $chan) || ($nick ishop $chan) { 
    set %blacklist [ $+ [ $2 ] ] 
    ban -ku600 $chan $2
    msg $chan 7~ $2 12has been add to the blacklist7~ 
  } 
}

on *:TEXT:[!@]deblacklist*:#: { 
  if ($nick ishop $chan) || ($nick isop $chan) {
    unset %blacklist [ $+ [ $2 ] ]
    mode $chan -b $address($2,1)
    msg $chan7~  $2 12has been deleted from the blacklist7~ 
  }
}
on *:JOIN:#: {
  if (%blacklist [ $+ [ $nick ] ] == %blacklist [ $+ [ $nick ] ]) {
    mode $chan +b $address($nick,1)
  }
}