Sure you can, but actually I don´t see any improvement over the current system - once you have a deadline, people will start waiting as soon as it passes by, not matter what you say.
Actually, I think we just have to roll back our expectations. Training isn´t something for Fridays, 11 AM GMZ (Germany), it´s something, that happens friday sometimes between 11 AM and 5 PM, so you better make sure you have your settings ready by 11 AM, and don´t bother checking before 5 PM ...
Zwei Dinge sind unendlich, die Dummheit und das All...