I propose, that we should remove depricated code, used to syncronize user table changes and user login/logouts with external websites, like MediaWiki and HiveMail.
We could easely find this code in user's unit files, e.g.
$sync_manager =& $this->Application->recallObject('UsersSyncronizeManager', null, Array(), Array ('InPortalSyncronize'));
Long time ago it was added to base "In-Portal" code and was expected to be used very frequently, however years have passed and this code is now not more then a reminder of incorrect decision made at that time.