Take a look at the silly ol' PDF. You'd think the Forbes guy would have too. This stores a "password secret". I.e. a password hint, not necessarily a password. This is a good idea I think as it grounds the device to you. Instead of giving that hint to anyone, the hint is further protected by the power charger requirement.
This doesn't push out a password, it further protects a password hint. This improves security. It doesn't open a new vector for attack that doesn't already exist.
Also, as with most things, turn it off if you don't want it.