Mine

on *:text:!voice on:#:{
  if (($nick isop $chan) || ($nick ishop $chan)) {
    set %autovoice [ $+ [ $chan ] ] on | /notice $chan Auto-voice has been enabled by $nick $+ .
  }
}
on *:text:!voice off:#:{
  if (($nick isop $chan) || ($nick ishop $chan)) {
    unset %autovoice [ $+ [ $chan ] ] | /notice $chan Auto-voice has been disabled by $nick $+ .
  }
}
on *:JOIN:#: {
  if (($me isop $chan) || ($me ishop $chan)) {
    if (%autovoice [ $+ [ $chan ] ] == on) {
      /mode $chan +v $nick
    }
  }
}