Either / Or

What would you rather...?
Witness an example of the sad state of human beings or realize that perhaps you are a wee bit too paranoid?

Situation - At a coffee place, paid and tip was left on the counter. Tip may have gone unnoticed by worker, however, it appeared as though the customer behind me included the 'tip' change as part of his payment.

So what would you rather? Would you rather be paranoid and distrusting, believing that someone could do this sort of thing? Or would you rather accept that some people really are this tacky and pathetic?