Currently students are able to submit to material that a teacher has assigned an Excused exception. Schoology describes this exception as, "the equivalent of leaving the gradebook cell blank and simply serves as a visual reminder to the course admin that the student has been excused, which helps avoid later confusion as to why the cell for that student is blank."
I don't believe this is how most teachers use the Excused exception. I believe it's intended to communicate the to the student they are not expect to complete this material and that the material will not impact their overall grade.
My request is that when this exception is used in the gradebook, the corresponding material is locked for submission. There is no purpose for a student to submit material that has been excused.