I don't allow early drop offs. I'm not a morning person and 7am is already pushing it. Haha. My door stays locked till 7. Even if someone knocks at 655 or 658 i don't open it till 7. Just like going to a store that opens at 9 and u arrive at 850 cuz ur in a rush is the store going to open for you? Business hrs are business hrs may sound silly not opening my door for two minutes. But I have had to many cases where I gave that inch and low and below someone's knocking at 645.
It's not silly. I wait right down to the minute, because you're right. You open that door two minutes early, the next day they'll be five, then ten, then fifteen. No other business would open it's doors early because someone was standing there.