It's the right thing to do for accessibility to alt text your photos. People who use screen readers need a faithful description of what's going on in the image.

But at the same time tech companies use the alt text to help train their various models, so every time you do it you're helping make chat GPT work its dark magic.

And also like alt texting protest footage makes it easier to search through footage after the fact and place charges on people.

It's the right thing to do but the worst people also benefit from it. You should still do it, but still.