It's not a hypothetical scenario. Plenty of banks work under Sharia Law and prohibit usury. Hell, the majority of the world's population was emphatically against usury for a long time.

> Are overdraft fees annoying? Yes. We've all had to pay them. But under the current system, we all have a choice as to whether or not we pay them. The simple choice is: balance your checking account. Punishing the banks for an individual not taking responsibility for his or her own money is shortsighted at best, and unsustainable at worst.

This argument is rooted in a logical fallacy - http://en.wikipedia.org/wiki/Just-world_hypothesis