Is it possible to turn off ALL unlock methods except fingerprint?

This is ridiculous. One of my biggest gripes with smartphones is that they always seem to activate in my pocket.
What I wish is to set my BB up so that ONLY fingerprint will unlock the screen. TBH, I do not care if it is MY fingerprint or anyone else's, I just want the device to only enable the touchscreen when a finger is placed on the sensor.

So...
Swipe to unlock - I want to disable it.
Double-click item on lock screen - I want to disable it.

I can understand that a backup to fingerprint is probably needed - how about maybe a keyboard key combo that will open PIN unlock?

Any thoughts?

I had the same issue but am not a fan of using fingerprint. I also want the phone to automatically lock itself when I put it away. So I ended up using Seidio's Spring Clip holsters - now on K1 and before on Priv.

You can disable the double tap in Settings / Display / Tap to wake/sleep.