A long time ago...
...way before there was a Wikipedia a journalist told me "the internet is a mine of information, much of it wrong". These days I think you could probably replace the word much with most. And yet many journos still treat anything they find on the net as gospel.
The worst thing is the cyclic citation. Do research on some Wikipedia articles and you will find that the citations point to other online sources, which point to others and so on eventually back to the original Wikipedia article. I wonder what the lowest hop count is at the moment. Probably 2.