Autosubscribe but not autocreate?

[azurit at pobox.sk]

Hi,

is it possible to set a mailbox to autosubscribe IF it exists but NOT  
autocreate if it doesn't exists? We are having problems with users and  
Spam folders which are not subscribed so users doesn't see e-mails  
which are saved there. On the other hand, we don't want to recreate  
Spam folders which were deleted by users (some of them don't want to  
filter spam so they deleted Spam folder and spam is saved into INBOX).  
Or is it somehow possible to subscribe to a folder while creating  
e-mail account (i'm trying to save its name to 'subscriptions' file  
but it doesn't work)? Thnak you.

azur