Be truthfull, stop telling frustrating lies.
If you deactivate everything for everyone, you cannot reactivate it again. I can understand that it takes some time, and that it is not done in real time, but then don't say that assessments are deactivated when in reality they are NOT. Put a timer, send a mail, but let instructors know WHEN they can reactivate an assessment after deactivating.
Thank you for posting to Share Idea. We have implemented a new feature to allow assessments to be activated for someone in more than one course. If you activate an assessment for a student and than deactivate it, the exam will be deactivated in that particular course. If the student is enrolled in two courses teaching the same curriculum, conflicting activations will no longer be an issue.