Tapping in pin in cinema
The default touch response on some devices doesn't seem to help either - I was in the cinema earlier this week and just before the film started most of the audience were on their mobiles. It was easy to spot the pin number in use by the guy in front unlocking his phone due to the numbers flashing when they were touched. Wondered if that happened to be the same pin for his bank card... I think the elevated, shoulder surfing position in the cinema makes it an easy place for your pin to be compromised.