Judge Grants Search Warrant Forcing Woman to Unlock iPhone with Touch ID
You can be compelled to provide fingerprints based on a warrant; I'm unsurprised (and not particularly bothered) that you can be compelled to use them on your own device.  If you care about security, don't use a fingerprint alone; at most, only use it as a second factor for two-factor authentication.  More generally, don't use anything that removes your ability to make a choice under duress, in whichever direction you see fit, based on what you're protecting and what you're being threatened with.I find the ongoing case of someone being jailed indefinitely for refusing to supply a passphrase far more concerning than someone being compelled to supply a fingerprint.