You're ignoring the payoff on invested resources. To "recruit" one of these schizophrenic ne'er do wells (or as the FBI called him, "a retarded fool"), the FBI

You're ignoring the payoff on invested resources. To "recruit" one of these schizophrenic ne'er do wells (or as the FBI called him, "a retarded fool"), the FBI has > a dozen agents working on it, cultivated CIs, a nigh-omnipresent surveillance operation, and effectively unlimited funds, over the course of several months. A corresponding effort by a group already under surveillance would noticed incredibly quickly and absorb massive amounts of resources that could just as well be used directly for ill.