Something

on *:text:*#*:#:{
  if ($me isop $chan) || ($me ishop $chan) {
    inc %warning. [ $+ [ $nick ] ] 
    if (%warning. [ $+ [ $nick ] ] == 2) {
      ban -ku600 $chan $nick Dont say other channels!
    }
    else notice $nick this is your 1 and only warning, dont say channels.
  }
}