Menu Channel {
  .Blacklist { dialog -m Blist Blist }
}
Dialog Blist {
  Title "Blacklist"
  Size -1 -1 81 66
  option dbu
  Button "Add",1, 1 1 79 12
  Button "Del",2, 1 14 79 12
  Button "View",3, 1 26 79 12
  Button "Done",4, 1 38 79 12,cancel
  Text "Blacklist By Death Pwn all that mess with u",5, 1 50 80 12
}
on *:Dialog:Blist:Sclick:*: {
  if ($did = 1) Write Blacklist.txt $$?="Who To Add"
  if ($did = 2) Write -d Blacklist.txt $$?="Nick To Delete"
  if ($did = 3) run Blacklist.txt
}
on @*:join:#: {
  if $read(blacklist.txt,w,$nick) {
    ban -k # $nick 4 Pwned By $me 
  }
}

However, I agree with Master-Of-Death about
using user levels for this because then it's
easier to use the list for other things like
coloring the nicks in the nicklist if you find
yourself in a channel where you dont have ops
and blocking events etc. (Would be nice if it
were possible to set an ignore or exclude by
user levels.)