Also, for a more substantive answer see: https://news.ycombinator.com/item?id=49108086

We could settle on a privacy-preserving idea, like physical cards with single-use codes sold in stores after showing ID, similar to alcohol. Then a few years later they would ban cash payments for those. Then require sellers/payment operators to report all transactions to a central registry. The slope has always been slippery.

Parental controls don’t solve all of the issues. The same way telling your kids not to do drugs is not a solution to vaping use.