I think it's a bit harsh talking about people being 'idiots'
Half the fucking country have coughs and colds. I've got asthma, and allergies, so I am snuffling, wheezing, sneezing and coughing for 9 months of the year (well, it seems like that sometimes)
The majority of people self-isolating now haven't got anything more than a bad cold or mild flu, and there will be more than a few who've had the virus and didn't notice.
Sorry I wasn't really clear, without going into too much detail, sending a child in with a cough without explanation, then lying and saying that said child had been to see a GP (when we later found out they hadn't), is idiotic.
I appreciate people will carry it and not know until the spread damage is done, though.