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John T. Draper (born 1944), also known as CaptainCrunch, Crunch or Crunchman (after Cap'n Crunch, the mascot of a breakfast cereal), was a phone phreaker.
Some hackers sometimes go by the handle “CaptainCrunch” even today; as a result of this incident 2600 The Hacker Quarterly is named after this whistle frequency.
The expense of sustaining the unbilled phone calls, the redesign of the line protocols and the accelerated equipment replacement due to the blue box is difficult to calculate, or even to separate from something as complex and dynamic as the telephone long-distance network, but it is generally acknowledged to be a huge sum.