Every so often, we get people saying that they don't want the box for their shoes. That's fine, no problem, we just write 'SOLD' all over it, and chuck it in the recycling. Until they come back and want to return them. What? Seriously, think of this from our perspective. How do you expect us to a) store them and b) sell them if we don't have the box? Did you think we would keep it in a special empty box store on the off chance that you'd come back wanting to return them? We have enough trouble keeping actual stock organised, thanks.
Also, people that leave clothes in the changing rooms. I understand if you don't re-hang stuff correctly, or on the wrong rack, or whatever. You don't work here, you don't know our system, fine. But leaving them in the changing room? Have a little common courtesy. That means those clothes won't sell until we check the changing rooms, and people won't use that room because they think someone else is already doing so.
I wish people would think of us as business, rather than their God-given convenience.