I wouldn't. I have misgivings about TouchID, but not because the NSA
might get copies of your fingerprints.
As far as the NSA goes: they're going to have a heck of a time making sense of the data from the 5S, assuming they can easily gain access. They'll have no idea
which finger(s) you took a print of, or know whether all the prints in your device belong to you, or other family members, or a spouse/signifcant other,
or even your pet. So, good luck tot he NSA on figuring all that out. As I've said before, there are more dependable methods of getting people's fingerprints that don't require getting into the internals of an iPhone.
The problem I DO have is that enabling fingerprint unlock means
lack of any chance of fifth amendement protections. Let's say a law enforcement agency decides they want access to your device and its data. Maybe they think you did something wrong. Or maybe it's not because of something
you did wrong, but maybe because
they might've done something wrong and you recorded it, and they want to delete it. If your phone happens to be locked by passcode, it
might be possible to stall or prevent them accessing the data by pleading the fifth, and refusing to divulge the passcode.
But if you have TouchID, you can't plead the fifth. They can just arrest you and use your fingers to unlock the device and get whatever they want.
