The school district where I work holds the kids responsible for sub abuse, because they want subs to come back. Consequences I think are more serious for sub abuse.
Last year I subbed in a difficult classroom. One student was most of the problem. I called the office, and told them that student was being disruptive, to please page him to the office. I always write a detailed report.
I got called in to sub this year. The teacher said that one hour was going to be difficult. There was a student in the class who was excruciatingly polite, but did nothing other than call me Ms. Bacon instead of Baker. The class was not a problem. In my report I commented on the oddity. Then a few days later I realized why.
I generally work in the same building, so the kids know me. Middle school-- I know, I know. There is one elementary that calls sometimes. Some of the kids in both buildings are remarkably helpful. The elementary calls me particularly for classrooms that have a higher % special ed, since that is my area.
Hopefully they won't expect me to pick up phone calls this year, their phone system is crap.
As for hearing loss and realizing it was a problem, that is wound up in a more painful issue that I would rather not discuss.