The changes over time in the numbers claiming a religious affiliation should be seen as, first and foremost, a change in perception of what affiliation is socially acceptable and useful. Such a change, then, may be less about shifts in practice and belief than social perception and pressure.
In some ways, it's a marvel that even half of consumers bother to lock their phones. You would think the benefits would be obvious enough: by entering a few numbers, you can achieve a basic level of protection from prying eyes.
The Washington Post editorial board jumped into a center of a decades-old debate by declaring their support for a universal national identity card. In reality, implementing an American national identity card would be an expensive logistical and bureaucratic nightmare.
Without strong safeguards for privacy now, it will not be long before these technologies -- sold to us as being for our good and aimed at making our lives safer, easier and more efficient -- will come to dominate every aspect of our lives.
What undermines the security of border crossings is that we have no established means of effectively verifying the identity of individuals. Relying on passports for that purpose is not going to cut it anymore.