Maybe, but you see my point. What if I accidentally knocked a load of products over and innocently tried to rearrange them, mixing up the price tickets? The idea that displayed price is a legally binding obligation is patently crazy.
It's not necessarily to the detriment of the buyer. Individual error can creep in and it would be ridiculous to suggest that any price advertised was legally obliged to be sold at. By this logic surely I could go into a shop, swap a load of price tickets around, then send a friend in to demand...