The Age Verification Trap: Verifying age undermines everyone's data protection

These so-called "platforms" already collect data about who people are in order to facilitate online advertising and whatever else the "platform" may choose to do with it. There is no way for the user to control where that data may end up or how it may be used. The third party can use the data for any purpose and share it with anyone (or not). Whether they claim they do or don't do something with the data is besides the point, their internal actions cannot be verified and there are no enforceable restrictions in the event a user discovers what they are doing and wants to stop them (at that point it may be too late for the user anyway)

"Tech" journalists and "tech bros" routinely claim these "platforms" know more about people than their own families, friends and colleagues

That's not "privacy"

Let's be honest. No one is achieving or maintaining internet "privacy" by using these "platforms", third party intermediaries (middlemen) with a surveillance "business model", in order to communicate over the internet

On the contrary, internet "privacy" has been diminishing with each passing year that people continue to use them

The so-called "platforms" have led to vast repositories of data about people that are used every day by entities who would otherwise not be legally authorised or technically capable of gathering such surveillance data. Most "platform" users are totally unaware of the possibilities. The prospect of "age verification" may be the wake up call

"Age verification" could potentially make these "platforms" suck to a point that people might stop using them. For example, it might be impossible to implement without setting off users' alarm bells. In effect, it might raise more awareness of how the vast quantity of data about people these unregulated/underregulated third parties collect "under the radar" could be shared with or used by other entities. Collecting ID is above the radar and may force people to think twice

The "platforms" don't care about "privacy" except to control it. Their "business model" relies on defeating "privacy", reshaping the notion into one where privacy from the "platform" does not exist

Internet "privacy" and mass data collection about people via "platforms" are not compatible goals

"... our founders displayed a fondness for hyperbolic vilification of those who disagreed with them. In almost every meeting, they would unleash a one-word imprecation to sum up any and all who stood in the way of their master plans.

"Bastards!" Larry would exclaim when a blogger raised concerns about user privacy."

- Douglas Edwards, Google employee number 59, from 2011 book "I'm feeling lucky"

If a user decides to stop using a third party "platform" intermediary (middleman) that engages in data collection, surveillance and ad services, for example, because they wish to avoid "age verification", then this could be the first step toward meaningful improvements in "internet privacy". People might stop creating "accounts", "signing in" and continuing to be complacent toward the surreptititious collection of data that is subsequently associated with their identity to create "profiles"

amplifying your point, there is effectively no way for the layperson to make this distinction. And because the app needs to send data over an encrypted channel, it would be difficult at best for a sophisticated person to determine whether their info is being sent over the wire.

This is the wrong implementation.

You require sites hosting adult content to send a header indicating what kind of content it is. Then the device can do what it wants with that information. A parent can then configure their child's device not to display it, without needing anybody to have an ID or expecting every government and lowest bidder to be able to implement the associated security correctly.

It doesn't matter what kind of cryptography you invent. They either won't use it to begin with or will shamelessly and with no accountability violate the invariants taken as hard requirements in your theoretical proof. If you have to show your ID to the lowest bidder, you're pwned, so use the system that doesn't have that.