[cappaert]

"It is estimated that 1 in 50 people do not have prints or prints clear enough to be registered by the fingerprint readers currently in use."

Can you provide a source? I'd be interested in seeing data to back this up.

[wazoox]

Dig a 1m deep, 5m long trench in your garden with pickaxe and spade. I guarantee you that you won't have the slightest trace of a fingerprint on both hands for quite a while.

Given the number of people working regularly with such tools, that's quite a sizeable number of smooth hands :)