Packing purchased items

I was purchasing groceries at pnp today when I noticed the cashier squeezing my strip of flings chips I purchased into my shopping bag. I told her not to squash them. She replies \ok""; so when the supervisor came I queried with her if the staff are trained as this is not the first time I had this problem. This reply was even more shocking;\""they know\"". Well now here is a surprise for you all - they don't know. It will take 5 min in the morning to brief the staff"