At a time like now, the Simpsons have the best take on the experts playing their role in the crisis:
Have I ever speculated on TV/Radiowithout much info? Um, yes. Have I been wrong? Indeed, I have. The most egregious error? No, not when I predicted heaps of terrorism in Lubbock. Probably when I didn't expect before the invasion that there would be much suicide terrorism afterward. Of course, I didn't know that Bush and his gang would make every mistake, but still that was a big one and became wrong pretty darned quickly.
I just hope the experts who are on TV now that are speculating that the Japanese reactors are going to be ok are more right than those speculating otherwise.