Besides the fact that it's not theft and you know it, that's the least of the problem here.
They are cutting out real reporting to save money, and printing random stuff people send them, or stuff they found on the internet (see Onion stories posted as real for example) and calling it NEWS.
Using a picture they don't have the right to use is just a symptom of a much bigger problem.
If they had paid for the picture that would not fix anything, it would still have nothing to do with the story it was posted with.
The story here is that they used the wrong photo, not that they didn't pay for it.
It's not that they are trying to save money by not paying for a photo, it's that they are trying to save money by not paying for reporters to actually check the facts and write the stories.