I've never had an issue with my Tesco Metro but on Friday it was frankly ridiculous. Nobody was taking any notice of the one-way system, so much so that I actually spoke to (2m apart of course) a member of staff to ask them to get a supervisor/manager to make an announcement because it was silly.
The worst for me is the old dears, who seem blissfully unaware of what is actually going on at the moment, despite having to queue to get into the store. One old dear in front of me, who scarily reminded me of Daisy from Keeping Up Appearances with her shopping trolley, entered one aisle the wrong way, and I politely informed her and pointed to the arrows to say she was going the wrong way. Her reply was 'oh'. On to the next aisle, she did exactly the same thing. I get some people suffer from a little confusion but this was sheer ignorance.
Staff regularly ignore the arrows too.