I read this post as along the lines of: “Isn’t it a shame that even if you don’t use instagram because of privacy issues, it is so pervasive in modern society that you will end up on it regardless”

Instagram almost certainly do facial recognition/tracking on a huge scale, and due to the popularity of instagram it’s practically impossible to opt out of it.

That was my reading of the article.

IIRC this works when the controller is plugged into the computer over USB. Bluetooth does not allow this.