I think I mentioned many pages back that my ex was a newspaper journalist. The one thing that she always said was that reputable papers never quoted unnamed sources. The only time a statement would be given as anonymous (or with a fake name) would be if it were a requirement of law or there were very strong reasons to do so if someone were to be potentially put in danger or suchlike. People making essentially trivial comments like these would never be quoted as anonymous sources as there is absolutely no journalistic reason to do so. I have first-hand experience of this as I asked her to do a story on a local issue where I work but she said that her paper wouldn't unless I was prepared to be named - which I wasn't. Any unnamed "source" in a paper has almost certainly been invented by the journalist who wrote the piece.