How about not giving the parents the teachers’ personal phone number for starters. Every and all contact should be through a school email or chat app.

And any email from a parent harassing or threatening a teacher gets escalated to the principal.

If it continues, the pupil is expelled from the school

This has been my experience as well. I use Linux Mint Cinnamon and two Canon PIXMA printers. One large format and one printer/scanner. Canon does not have any Linux drivers on their website, but they were recognized and supported when they were plugged in. Pretty much plug and play

One thing I’ve noticed though is that the CUPS drivers seem to be the bare minimum. You can’t do things like see ink levels and the color/brightness levels are off by quite a bit. A lot of times It takes a lot of tweaking to get colors accurate that for a lot of my photos, I just fire up the windows machine and print them from there