richms: I'm disappointed that you put the stuff back on the shelf.
When I have been to countdown in highbury and they have had huge queues at the checkouts (I dont self checkout after the last hassle I got there from security staff) I have on at least 3 occasions just walked away from a trolly of 15-20 things because it had been 10 mins, about 8-9 people queued at the one or 2 open checkouts and the staff milling around the checkout supervisor area not getting off their arse and opening another one.
If they have to put it all back it will hopefully make them think.
I hope you don't do this with chilled or frozen products! The amount of waste that's caused by people dumping chilled/frozen products in supermarkets is horrifying. In my younger days when I was based in different supermarkets I spent a lot of time dealing with this wastage which would often amount to hundreds per day at the larger markets.