well this was actually created for #Skype on undernet and i think i should add it here so everyone could have access to it, enjoy :)
When loaded right click in the channel to see some options,
And Make Sure to edit the #CHANNEL_NAME_HERE
you don't need to edit the line 4 with #channel its only a warning msg.

This script will Give +v to everyone who joins and idle devoice if the user is idle, all settings are modifiable with right click menu.

This was written by SanitariuM on undernet.org #mircscripting

#My info: xplorer@live.ca - irc.undernet.org - #mircscripting
#Script infos: Made by SanitariuM @ Undernet - #mircscripting

on *:join:#CHANNEL_NAME_HERE:{ 
  timer 1 5 mode $chan +v $nick 
}
on *:start:{
  set %i.limit#CHANNEL_NAME_HERE 1800
  timer 0 600 check.idle #CHANNEL_NAME_HERE
}
alias check.idle {
  var %chan = $1
  if ( %i.limit [ $+ [ $1 ] ] == 0 ) {
    .echo 4 -a Idle Check is not set for this #channel
    return
  }
  var %nick = $nick(%chan,0,a)
  while (%nick >= 1) {
    if ($nick(%chan,%nick,a) != $me ) {
      if (%nick !isreg %chan) {
        if ( $nick(%chan,%nick,a).idle > %i.limit [ $+ [ %chan ] ] ) {
          if ($me isop %chan) {
            mode %chan -v $nick(%chan,%nick,a)
          }
        }
      }
    }
    dec %nick
  }
}

menu channel {
  -
  Idle Limiter
  .Set :set %i.limit [ $+ [ $chan ] ] $$?="Idle limit? (1800 = 30 minute) "
  .Reset :unset %i.limit [ $+ [ $chan ] ]
  .Check:check.idle $chan
  -
}