I think this gets me my Karma points for the week

Went to the ATM to withdraw money today, and the guy before me in the line left himself ‘logged in’ to the terminal, having forgotten to answer “Do you want to do any more transactions today?” I was a good boy, and pressed “no”.

That does bring up the point of defining transactional boundaries. It used to be that the machine would hold your card until you were done, which made it relatively clear that you weren’t done yet. However, it’s been eons since I’ve seen one of those style terminals - they’re all the ‘dip and remove’ style around here.

Perhaps a big red border around the screen, with your name or “Transacting” in the corner, which appears until the transaction is entirely over?