Which 'harmless' British social sin should we actually feel guilty about?

You spot the high-vis tabard from 30 yards, suddenly become fascinated by your phone, and execute a flawless diagonal across the pavement. Cowardice or self-preservation?

Two shampoos is fine. Emptying the housekeeping trolley into your suitcase is a lifestyle. Where's the moral line on tiny bottles of Elemis?

You've seen Dave's 11th message about the stag do. You'll deal with it later. 'Later' becomes a moral graveyard of unanswered plans.

It was actually your spreadsheet error, but Karen's already apologising. You sip your tea and let the moment pass. Complicity in a lanyard.

Someone's playing TikToks on the train without headphones. You tut audibly, exchange a knowing glance with a stranger, and do absolutely nothing else.