Disallow Custom BBCodes in Signature
 

From the Signature Permissions of User Group Manager, it has these in the Help:

Quote:
Allow BB Code
This is the global switch for BB codes in the signatures of users in this group. Individual BB codes may be controlled by the additional permissions displayed below.

Note that custom BB codes cannot be controlled by any permission; you can only disable their use in signatures by disabling all BB codes in signatures.
Note the part in red.

My question is, if social group messages options have a check box for allow/disallow custom BBCodes, why can't the signatures have an option like that? I have custom BBCodes like YouTube and would like the ability to disable those in sigs.