Actually...
They've already blocked my card twice before, after a couple of heavy web spending sprees (entirely on DVDs and books, honest) presuming my card to have been stolen.

So I had to sit down and confirm a list of about 20 online DVD stores as being geniune payments by me.
(R-T-C Got arbitrage profits?, Fri 8 Jul 2005, 9:54, archived)

You've got to be going some
to mimic the spending sprees of a 1337 H4X0R!

Well done, that man!
( Johnny Catfish - Yowsa!, Fri 8 Jul 2005, 9:58, archived)