However, if I was running a foreign site not subject to UK law or other privacy law, with UK visitors, and I was a ruthless businessperson, I'd definitely implement this verification thing in order to collect and store a photo of every visitor.
If you wanted to do this for some reason you'd just do it across the board and say it was for age verification. The reason nobody does it is because people are (rightfully) not okay with this nonsense.
