Paolo Redaelli
Feds Walk Into a Building, Demand Everyone’s Fingerprints To Open Phones – Slashdot
A good, sound reason to avoid usage of fingerprints instead of passwords.
You won’t access my private data unless I willingfully want it.
Adding that fingerprint authentication also requires quite a lot of computing power and memory I can only resolve to stick to plain old passwords. 
It’s also good to know that xkcd.com has good, sound suggestions on how to choose good passwords