Give a man a fish, and he'll eat for a day. Teach a man to fish and he will dragnet the bottom of the ocean floor, dump 90% of what he catches as unmarketable, pollute the skies with greasy black smoke from his fish canning factories, wipe out the various species of fish that he has been exploiting, devestate the ecosystem, process his dead into Soylent Green, fall into a deadly downward spiral of food-riots and warfare, blow up the planet, and be succeeded on the top of the food-chain by cockroaches.

That's the version I heard.