I've heard of people doing this before, removing their fingerprints with a sander..
But I believe the fingerprints will grow back after a while. Couldn't you get into more trouble if they grow back and you are carrying around a passport with no fingerprints in it? Or do you plan to keep sanding them off for the rest of your life? (or the life of the passport)
As the author claimed there are many reasons you may not have had fingerprints. Personally, I would try the tried and trusted 'shrug, I have no idea' method.
But I believe the fingerprints will grow back after a while. Couldn't you get into more trouble if they grow back and you are carrying around a passport with no fingerprints in it? Or do you plan to keep sanding them off for the rest of your life? (or the life of the passport)