Perhaps this isn't the best idea.
This also reminds me of the time I was in the National Portrait Gallery and I saw a friend of mine in a painting from the 1800s. In the painting, he was a farmer holding pumpkins. So I know this sort of thing has been around for a long time.
I also have found people by googling random things and stumbled across familiar faces.
Perhaps there is a rotation of approximately a few thousand people in this world but when they have different hair cuts and clothing they seem to look different. If you see my others frantically wave hello like you know them. I think they will appreciate it.