For this issue I decided to take a page out of Symantec's book, change the folder's Attribute. I've been playing with this for a while now, it works very well and is very easy to setup and maintain.
Create a new folder in Jobs and Tasks and allow all the normal read, execute, etc for the roles who will be running the jobs. In this example the folder's name is "ZZZ Hidden".
Create a new task of type "Run SQL Query on Server" and in the first enter the SQL update command of "Update Item Set [Attributes] = '1' where [Name] = 'ZZZ Hidden'" and name it Hide Helper Tasks.
Create a second of the same type and enter: "Update Item Set [Attributes] = '0' where [Name] = 'ZZZ Hidden'" and name it Show Helper Tasks.
Put these 2 tasks in an area that only your Quick Delivery task creators can access and not other support groups.
Move your Quick Delivery tasks into ZZZ Hidden, run Hide Helper Tasks and refresh the Jobs and Tasks page. Folder's gone. If permissions for the folder are correct your Support team can still see the tasks within the job's list and execute the job but can't directly load/execute the task without taking the extra effort to do a search in the global search in the top right of the web console (does anyone use that search?).
This has been tested on Symantec Management Console 7.1 SP2, not 7.5.
Attribute List from fnGetItemAttributes in the database:
Attribute = 0
'Normal' - 'The item has no special requirements or constraints.'
Attribute = 1
'Hidden' - 'The item is hidden. It should not appear in the UI and is used internally by the NS.'
Attribute = 2
'NoModify' - 'The item is readonly. It cannot be Modified. This overrides any permissions on the object.'
Attribute = 4
'NoReplication' - 'The item will not be replicated to other servers in the hierarchy.'
Attribute = 8
'RunTimeLocalized' - 'No longer used.'
Attribute = 16
'NoDelete' - 'The item can not be deleted.'
Attribute = 32
'NoClone' - 'The Item can not be cloned.'
Attribute = 64
'HiddenOnEmpty' - 'This attribute only applies to Folder items. The folder item is hidden if the folder is empty.'
Attribute = 128
'NoExport' - 'This item can not be exported.'
Attribute = 18
'Readonly' - 'NoModify + NoDelete'
Attribute = 256
'System' - 'The item was created as part of a product installation (as opposed to being created by the user)'