you could clean it up abit

on *:JOIN:#: {
  if ($($+(%,banned,.,$address($nick,2)),2) > 0) { 
    ban -k $chan $nick 2 you are on the Pban List and are not welcome here!! 
    msg $chan $nick is on the Pban List and is not welcome here!! 
  }
}
on *:text:!pban*:#: {
  if ($2 ison # && $nick isop # && $nick != $2) {
    inc $+(%,banned,.,$address($2,2)) 
    ban -k $chan $2 2 you are on the Pban List and are not welcome here!! 
    msg $chan $nick is now on the Pban List and is not welcome here!!           
  }
}

you dont need to use the kick line if you are useing the -k switch in the ban