Chip and PIN

[Roland Perry]

In article <E1JIM2j-0004mv-00@mta2.cl.cam.ac.uk>, Ross Anderson 
<Ross.Anderson@cl.cam.ac.uk> writes
>There's another Munden case in the pipeline - a police employee who
>complained about phantom withdrawals, whereupon the bank accused her
>of attempted fraud. She's awaiting trial. It's disgraceful.

What is it about such cases that makes the banks prosecute, rather than 
just ignore the punter (like the OAP "card locked in the safe" one on 
the radio earlier this week - why isn't he also being prosecuted for 
pleading innocence).
-- 
Roland Perry