The problem with these predictions are that they are made vague by the predictor and re-interpreted later, often after the event predicted occurs, and are re-tooled to fit the event or something that is seen as pretty bound to occur in the very near future. Just once, I'd like to see one of these guys predict something and tell us about it "SPECIFICLY" instead of the thing passing from person to person getting re-interpretted and re-tooled like the stuff above.
I took a parapsychology class for fun back in high school and I worked on de-bunking a LOT of this stuff.