I used to be a connoissuer of crank physics theories. My main internet hangout before I discovered FreeRepublic was alt.sci.physics.new-theories on usenet.
The challenge was not in debunking the theories, but in distinguishing between, as they say, "those who strain at the oars to reach Kook Island, and those who arrive by magic carpet with no idea they've made the voyage."
I came across this guy's work while checking some relationships between physics and prime number theory. I've never made up my mind whether he's on to something or not.
Matti Pitkanen. Somehow, p-adic numbers just don't seem right in physics. Any thoughts?