WND is not a questionable source. They often have their own commentary or articles on things that others have reported on but they also do have some groundbreaking reports like the discovery that some porn site photos appeared in the arab press as "evidence" of abuse at Abu Ghraib and the "raping" of Iraqis. They even brought it to the attention of the State Department and asked about it at a White House press conference.
Despite all of this, the Boston Globe STILL ran the photos in print claiming they were genuine.
A source isn't automatically credible just because it has SOME decent information on it.
Don't misunderstand me, I like some of the content on World Net Daily. But it's just too much like a conservative tabloid to put a lot of stock in the stories it presents without looking for verification from another source - and then the news might as well come from that other source.