this would be verry handy indeed.
When an admin logs-in and set a certain site inactive for that user.
if the user logs in he can change this back to active.
Which isn't good in my opinion. When a client doesn't pay I want to keep his files for 7 days before deleting them (bank transfer might be late) if I set the site inactive he can put it back online. And I don't want to delete the site so loses his site completely...
Put this feature on high need please