"You know it will happen, because any interaction with government wherein a civilian says, "No" eventually ends with guns in the civilian's face."Of course it will, because that's what a law IS: When you pass a law, you are effectively saying "This thing is of such momentous import that, if you do it (or don't do it, whichever,) we will compel you with force, and will back that force with the guns of the state. This is something that is so important that compliance is worth, push come to shove, shooting people."
It's pretty easy to get behind that concept for murder or theft; letting people run around doing those things would make having a peaceful society a little difficult. You could probably even get behind it for driving the wrong way on the interstate. But when someone suggests shooting people in the face if they persist in putting their sugar water in the wrong-sized cup, the correct response is to laugh them out of the room, not debate the logistics of implementation.