[smsm42]

That's like dumpster diving only on planetary scale and no actual dumpsters involved. Wonders of technology and interface designers that don't realize people don't read docs and expect things to work properly by default.

But the dd thing is really embarrassing here, I mean I'd expect some data on shared hardware being recoverable using hardcore forensics, but there are enough levels between hardware and dd that using at least one of them to make old data inaccessible should be both possible and pretty cheap.