I think it's valid. Photo was posted on an internet platform. A few people reading HN work with the internet. Who knows who becomes liable for strange legal act

I think it's valid. Photo was posted on an internet platform. A few people reading HN work with the internet. Who knows who becomes liable for strange legal actions like this one. It informs and then we get to discuss, about the possibilities. The article doesn't mention how she obtained a digital copy of the photo, so she could post it. That's seems to be an important point.