Facebook can of course do whatever it wants, and users as well. But bystanders should be able preserve their privacy if they so wish. The only way to do this is active obfuscation.

Here's hoping 2017 is the year it gets scaled up, because it would sure be profitable, with the right implementation.

A friend of mine had something similar[0] on his car (it was a Lamborghini) to avoid his car being identified in images online. I'm sure it's not hard to have hoodies and tee shirts with this integrated. It's not visible to the human eye so unless you hold up a camera, it'll not be a problem. That said, this might be an issue if you visit a bank or airport or something along those lines. [0] - https://www.youtube.com/watch?v=Z2oYReMaS4A