Regarding children in supermarkets with their single parent, who's to say they're any more likely to be infected or indeed infect anyone else than any of the adults in there? Many, many years ago I used to take my 4 children shopping with me (husband worked away from home for days/weeks) and they NEVER ran around or got in anybody's way, and they didn't touch anything on the shelves. It's called discipline. If a child isn't being controlled then by all means warn the parent and if it continues eject them from the shop, but to prejudge is just prejudice.
Thought I'd hit the jackpot securing an Iceland delivery tonight. Shame two thirds of it never materialised ..... oh well at least I got the milk and potatoes, shame about the bread, eggs, beans, salad stuff, fruit juice ......etc