Treating after_node or before_comments zones for blocks

Some themes have a special zone after_node or before_comments resulting on some blocks being placed right after the first node.
What if you add a small piece of code in order to handel those things?
It might look as

<?php if ($before_comments && !$teaser): 

endif;
?>

Since those zones can be named in different ways I suggest creating a forum variable holding a name for such a zone.

P.S. Again, I have something like that in my theme and style. This request is to make a usefull feature available to eveyrbody