In message , at 15:14:16 on Fri, 2 Mar 2012,
Stephen Sprunk remarked:
The train companies already don't accept Solo and Electron[1], because
they (the train companies) don't have online verification, so they'd
just add those sorts of cards to that list.

[1] Debit cards for accounts with no overdraft facilities and/or
impoverished customers, like students, and under-18's.

The same problem could be had with an near-/over-limit credit card,
whereas one of those evil debit cards could have plenty of funds
available. It seems a rather arbitrary distinction.

The difference is that someone with a credit card has been shown to be
eligible for credit *at all*. All you are doing is allowing a slightly
elastic limit. The debit cards are for people who don't qualify for
credit, either because of their age or their history.
--
Roland Perry