The example of the weapons of mass destruction is a very bad one. Cloudtrapezer makes it looks like it was an invention of the mainstream media while it was not. It was created by the US government and seconded by the British. The creator of this fake news where government institutions who said the intel was coming from their official intel sources and was further classified. What do you expect the MSM to do; call the Iraqi ministry of information for a confirmation? Yes Muhammad Saeed al-Sahhaf here: no we don’t have these WoMD here, have a nice day.
The MSM never claimed that they had found out about the WoMD but simply reported what the government told them.
The only thing you can blame them off is that they were used by their governments to spread fake news. (And again fake news they could not verify and that was part of a government plot to spin reality).
This was probably a lesson for the proper media to not belief everything the government tried to make them belief.