I don't know... maybe because there aren't enough *intelligent* people to keep the hacks on the prediction pages in check?
I guess my post looked mean-spirited...but we don't have people in the actual forum predicting a 45-state blowout for one party and have half-a-dozen people sincerely applauding their prediction "because it looks exactly like mine". I never suspected it to be that extreme. I thought it was sort of sociologically interesting or something, because I guess it has to do with the prediction being more anonymous, etc.