I wouldn't underestimate the social engineering aspect of it. Refusing to charge someone's dying phone with your computer comes across as kind of a dick move,

I wouldn't underestimate the social engineering aspect of it. Refusing to charge someone's dying phone with your computer comes across as kind of a dick move, since it's perceived as costing you nothing and really helping out the other person. Especially now that POS systems and what not have USB ports, it's not too farfetched that someone would ask a non-techy waitperson to please charge their phone for them, meanwhile it downloads the last thousand customers' credit card numbers.