There should be a way to do that automagicly no? Anytime you see a grouping of digits like ###-###-#### black it out? I guess it all depends on how good the OCR software is.
In other words, the risks avoided by paying the best heuristic computer known to man -- a human -- far outweighs the cost of the resource.
> COP considered dumping the raw data online for anyone to view, but decided against it because it would involve the publication of sensitive personal details—things like mental illness, drug addiction, or cases involving minors.