On Fri, 15 Feb 2008, Ray Saintonge wrote:
I think that some Wikipedians still need to learn that the demand for substantiation can sometimes be taken to extremes when they expect proof for "facts" that are a part of common knowledge.
In my experience, often the users know better and they're just gaming the system--they want to delete something they know very well is true, so they insincerely question it. If they get lucky nobody will provide a source and they can delete it.