LIFE at RatSkep has just implemented this forum MOD http://www.phpbb.com/community/viewtopi ... 9&t=937075 (http://www.phpbb.com/community/viewtopic.php?f=69&t=937075)
What it does is automatically remove the inner (oldest) quote when you get to the quote nesting limit (currently set to 3) saving the user the trouble. If it works there maybe we could consider setting it up here?