That’s awesome if it works. But I had to provide IT support at a school once that had to specifically tell even contractors to please not being anything with peanuts onto the school grounds. They had a kid with a severe peanut allergy and a habit of licking everything (behavioural “quirk” to put in nicely, I had literally been licked on the elbow).
Admittedly that was only once in almost 20 years of doing IT support in schools. But I am more than happy to sacrifice some personal liberty in that kind of situation.