vbulletin editing published article moves it back to moderation

[Budget101]

Is there any way to change the settings, alter the templates so that when a member edits their published article it automatically moves it back to moderation until it's viewed by a mod??

Currently all articles are moderated, once they're approved, some folks are going back in and editing their articles to add spam links. Unfortunately, adding if conditions to the edit buttons doesn't do any good because they can use the direct url (edit) and it will still load, allowing them to spam.

I need a way to automatically "unapprove" edited articles- anyone with ideas??

Thanks!

Also- I have the permissions set sop users can Create Content, (but NOT publish Content) but this is still allowing them to Delete Content, which they shouldn't be able to do. the vbCMS Comment forum disallows this, but when editing in the CMS- they can delete it regardless.