The FBI is investigating around 1000 Americans as suspected possible future "lone wolf" terrorists.

How many of them, left to themselves, would commit terrorism? Based on general ideas of human behavior, I would guess around 10. Suppose that investigation might prevent 5 of them. (Stopping a crime which would be committed on the spur of the moment cannot be counted on.)

Are roughly 1000 FBI investigations of people only thinking of committing a crime less harmful to Americans than a handful of attempted crimes?