Law Enforcement Safety Tip: Always look through the peephole before answering the door.
"Wait! Don't you know how dangerous it is to run with a sharp object? You'll poke someone's eye out!"
This may surprise you, but New Zealand really likes Lord of the Rings and The Hobbit. Air New Zealand even partnered with WETA Workshop to make this safety video.
Like any school, I'm sure Hogwarts must have had a few PSA posters adorning its halls. If not, maybe it should have. Might have lowered the schools mortality rate.