A family member had a child over to my house a few months ago and was giving the kid candy left and right and the girl hadn't had a nap. The adult was going to go grocery shopping after our house ( because it was convenient) and said something alog the line of "don't be bad and make me have to spank you."
Sorry, you have a 4 year old who hasn't had her usual nap and is on a sugar high and you expect best behavior at the store?? Not responsible ADULT behavior. Sometimes a small inconvenience like going later ends up avoiding a meltdown or temper tantrum.