Am I missing something here? It's incredibly easy to keep track of one's day
to day charges right at the time they're made, either by entering them in a
program like Money, or onto an Excel spreadsheet, or simply in an
old-fashioned check register. I guess if you carry a balance and are having
interest computed daily, you might have to estimate that, but even that
shouldn't be an insurmountable problem.
Since when did it become the bank's responsibility to make sure you didn't
exceed the limit they authorized AND THAT YOU AGREED TO via your use of the
card?