Erasing all digital footprints 'impossible'

It's been almost two decades since mainstream users began trekking into the library-slash-playground known as the World Wide Web. Now, several years into that excursion, many are taking a long hard look at the trail they've left behind.

The idea of tracing our steps through the digital jungle and departing it like we were never there seems too ambitious, almost unfathomable. But what would it take for an individual to erase his digital footprint? Is it even possible to exit the Internet? The short answer is no.