So you stiffed the waiter, who probably makes less than minimum wage in order to send a message to the restaurants management?
Makes no sense to me, of course I always have some cash.
well, IMO, the waiter probably should have made sure that you knew they only accepted cash, no credit cards. It's an unusual policy but not completely unheard of.
However, that being said, I probably would have tipped something as long as the service was decent.