I had a similar issue recently, and the journalist whom I contacted by phone told me that he had checked the EXIF and IPTC, and acted as he had, failing to find relevant information there. I also contacted the person responsible for putting my image without any source, author or information on their image database, who wrote me that it was the responsability of the author to give information (sic).

Now, we want to be practical:
- As to the ignorance of these professionals with respect to their own field, I don't think that much can be done. We cannot educate all these people into Bern Conventions, copyright being automatic, images not to be used unless one has authorisation, etc.
- But we can make efforts provide EXIF and IPTC

It's either that, or a painful campaign against piracy, which I doubt would be efficient and sustainable.
-- Rama