Someone

on *:TEXT:!enable av:#:{ if ($nick isop $chan || $nick isop $chan) { set %aven [ $+ [ $chan ] ] on 
  msg $chan Auto Voice: ON } 
} 
on *:TEXT:!disable av:#:{ if ($nick isop $chan || $nick isop $chan) { set %aven [ $+ [ $chan ] ] off    
  msg $chan Auto Voice: OFF } 
} 
on *:JOIN:#:{ if (%aven [ $+ [ $chan ] ] == on) { 
  mode $chan +v $address($nick,2) } 
  else { halt } 
}