Don’t get me wrong, I’m all for privacy. But between setting up the birthdate when creating my children’s local account on their computers, and having to send a copy of their ID to every platform under the sun, I’d easily chose the former.
I’d even agree to a simple protocol (HTTP X-Over-18 / X-Over-21 headers?) to that.
I disagree.
There was a certain (large) amount of government surveillance and eavesdropping going on before the GWOT, which was used as an excuse to massively expand it. There was already inspection and security and traveler record-keeping at airports before the GWOT, which was used as an excuse to expand those. CBP had long had the legislative authority to do all kinds of nastiness within 100 miles of a border before the GWOT, which was used as an excuse to step their activities up, to legal limits and beyond.
In every case, an initial claim of urgent, exceptional authority was used to create both the physical infrastructure and the cultural permission required to make later, expanded claims of urgent, exceptional authority much easier to implement when an excuse presented itself. That is the slippery slope, we really slid way down it, it’s a real phenomenon. It doesn’t have to be smooth or gradual, it can happen in jerks and waves. It doesn’t have to come as a result of a plot, a plan, a deliberate conspiracy, it can be an accretion of individually opportunistic acts.