Someone

on *:TEXT:!blacklist *:#: {
  if ($nick isop $chan) {
    writeini akick $chan nicks $address($2,2)
    msg $chan $2 added to $chan $+ 's Blacklist by $nick $+ .
    cs akick $chan add $2
  }
}

on *:TEXT:!unblacklist *:#: {
  if ($nick isop $chan) { 
    remini akick $chan nicks $address($2,2)
    cs akick $chan del $2
    msg $chan $2 Deleted from $chan $+ 's Blacklist by $nick $+ .
  }
}

on *:JOIN:#: {
  if ($readini(akick,$chan,nicks) == $address($nick,2)) {
    ban -k $chan $address($nick,2) User Blacklisted from Channel.
  }
}