Mine

on *:TEXT:!Leave *:#:{
  if ($nick isop $chan) || ($nick ishop $chan) || ($nick isvoice $chan) {
    /msg $chan $nick has asked me to leave because $2-
    /part $chan
  }
}
else { 
  if ($nick !isreg $chan) {
    /msg $chan $nick tried to make me leave that wasn't very nice.
    /kick $nick
  }
}