I've been trying to come up with a good Oyster killing method since Transport for London made Oysters near-mandatory (you can't get a week-long pass without any Oyster anymore, and the buses are incredibly expensive if you don't pay by Oyster). In my ideal world, I'd pay cash for an Oyster card, use it for a couple weeks, trash it, and get a new one, so that there would be no long-term ride history for me on file.
Unfortunately, the ticket-agents have started to charge £3 for replacement Oyster cards, which I'm sure they'd waive if the card was malfunctioning. Microwaving the card leaves behind some unfortunate burn-marks.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.