i know my post will not be popular but its how I think others may see this situation. Look at it this way...if you had a store and someone took an item that was a meaningless thing, with no value and was not for sale and just took it and left the store...if this happened all day long, it may be a box, it may be a pen, or a paper clip...an eraser, a roll of paper, etc....by the end of the day these things add up. its going to cost "someone" money and its always the business owner. The store may have overreacted but maybe it happens all the time to them and your taking the box may have been the last straw. Why didnt you just ask for the manager and say you would like to have the box and would it be ok with him if you took it? or even to have paid for it? which they probably would have said to just take it, its ok.