Do and Don't: Housekeeping is MAJOR

I understand how store can be busy and when delivery comes in, it adds to the chaos. However, is it acceptable at any one point to line boxes along an aisle, thereby blocking access to merchandise? Isn't that lost sales?

DO: Clean clear aisles are inviting and does not deter customers from coming in despite the line up at the cash desk.

DON'T: No room to store just delivered inventory? Maybe stacking them up closer to the back will minimize hindrances and allow more access to products being sold. Besides, these are trip hazards and the last thing retailers need is a lawsuit.