Facebook Going Down Reveals Hidden 'Image May Contain' Message Left in Pictures

I submitted this because I don't know why this is news.

Detecting image features is quite commonplace now with off the shelf software or cloud services.

I guess Facebook is under too much scrutiny... Anything they do will be taken out of context.

This is not a secret: https://www.facebook.com/help/216219865403298?helpref=faq_co...

It's- it's alt text?

Is this new to people?

Exactly. There are suddenly dozens of articles everywhere about how images are automatically tagged with alt text over at Instagram, etc. If there is anything other than the current apparent need to use the phrase 'AI does this' I truly don't get it.