[ConfuciusSay02]

They tried that mate. But it turns out it's hard to find credible weapons experts that are total hacks with no qualms about lying. When it became clear that their chosen expert was going to expose the fact that there were indeed NO WMD's, he promptly died shortly before his report was due to be published: https://en.wikipedia.org/wiki/David_Kelly_(weapons_expert)

By comparison, posting on online forums can be done very easily by anyone of any character.