Seems a tad limited, how many transactions does Mastercard process every second.   Im kinda amazed, waiting for the but actually part...
Not sure if such a person could be banned or declined service, restricted in their access or priority over others with reference to their previous (recent) use perhaps.     The natural state of all capitalist systems is be thrown apart and in a way its a positive because it forces a tendency towards competitive useful products, sure this is a fool screwing things up but it has to be anticipated he wont be the last to try or even that it might occur naturally under stress