Hypothesizing is good. Getting data to validate or invalidate your hypothesis is better. In South Africa they use chip and pin (also tap and go for small amoun

Hypothesizing is good. Getting data to validate or invalidate your hypothesis is better. In South Africa they use chip and pin (also tap and go for small amounts, and tap and pin for larger amounts. Most gas is tap and pin). Incidentally there is also no self-service for gas country wide. The way it works is that each pump has a portable wireless card machine. The attendant fills in the amount, you tap, and if necessary he hands you the machine to enter a pin. They look away (in an obvious manner) for this step. He doesn't handle your card. Incidentally this is true mostly everywhere - you handle your card, not the vendor. Obviously you never give your PIN to anyone - much less shout it across a forecourt.