Standards innit. They should be upheld. Plus, in PJ's you have slept in them, one layer between someone's council estate clopper and my ready ripe avocados. People dribble piss, spaff and sex wee out of their tuna slice or John Thomas throughout the night. People who wear PJ's to the shop are...
A dash out to the shops for a quick pint of milk in joggers is fine, as is going to the supermarket in decorating/building gear, I do so after work most days but a full shop in your Jammies? Unacceptable.