mask.of.sanity writes: Fraud fighters David Byrne and Charles Henderson say one of the world's largest Point of Sale systems vendors has been slapping the same default passwords – 166816 – on its kit since 1990. Worse still: about 90 per cent of customers are still using the password. Fraudsters would need physical access to the PoS in question to exploit it by opening a panel using a paperclip. But such physical PoS attacks are not uncommon and are child's play for malicious staff. Criminals won't pause before popping and unlocking. The enraged pair badged the unnamed PoS vendor by its other acronym labelling it 'Piece of S***t.