He catapulted me to notoriety in 1976 in his MIT Technology Review Article reprinted as Magic and Paraphysics in his book, Science, Good, Bad, & Bogus.
How do you rank:
String theory?
Hot Fusion?
Cold Fusion?
Quantum Computing & Cryptography?
Global Warming?
UFOs?
Paranormal?
Economics? (e.g. financial derivatives)