You have nothing to hide from the current government (maybe). You don't know who will be in charge in 1, 10, 50 years. You might not need an Ahnenpaß right now,

You have nothing to hide from the current government (maybe). You don't know who will be in charge in 1, 10, 50 years. You might not need an Ahnenpaß right now, but do you really want evidence on record that will deny you one in 20 years time?