I think people who are old, fat, infirm, surrounded by children, bored or all of the above, should be banned from any supermarket between the hours of 1200 and 1400 on a weekday.
I sometimes run in to the Asda near work on my lunch hour to get a couple of things only to run into a pair of old biddies with no spatial awareness who have to stop dead in front of me, park their trollies alongside each other in the middle of the aisle and say things like "ooh Brenda, the yogurts are buy one get one free"....
Then I'll be tripped up by a small person with a bogey on their finger, while mum mildy says "Lotus-Flower Opium-Tree, come out of the nice lady's way, poppet!"
Finally I'll be held up at the checkout by the coupon counters, penny payers and price disputers.
To top it off, I'll then not be able to get out of the car park thanks to birds in Peugeots who have to do a 9879879485754 point turn to get out of their space