I don't doubt that you regularly do not follow instructions. Everyone knows many instructions err on the side of caution and not literally following them doesn'

I don't doubt that you regularly do not follow instructions. Everyone knows many instructions err on the side of caution and not literally following them doesn't add any risks. Almost everyone crosses the street when the light is red, but there is not a car in sight (and the view is clear). Many people will use perishable products after their guaranteed 'fresh until' period. However, this also happens for instructions you don't actually know the reason for. People will mentally substitute a convenient reason. Take the antibiotics for 3 weeks? "Yeah, probably because it sometimes takes 3 weeks for the infection to be gone. It probably doesn't hurt to stop after 2 weeks; I mean, what could it do?". People are not even aware of reasoning in such a way and saying "it doesn't have to be well explained" disregards that well known fact about human psychology. If you want people to do something, explain why. In fact, that even works when your reason doesn't make any sense. "Can I please use the copy machine before you, because I have to make some copies of these documents" will get more compliance than "Can I please use the copy machine before you".