Even those who believe the National Security Agency's vacuum-cleaner surveillance of electronic communications does not trample privacy rights should be troubled by this practical implication: If you try to know everything, you end up knowing nothing.
An investigation by The Washington Post, which examined a cache of intelligence reports provided by fugitive NSA contractor Edward Snowden, illustrates my point. The agency is gathering and warehousing enormous amounts of private information, most of it irrelevant because it concerns innocent individuals — mostly foreigners, but some U.S. citizens as well.
By "innocent," I mean the NSA is convinced these people have no involvement with any activity that poses a threat. But the agency keeps their information anyway.
Reporter Barton Gellman, researcher Julie Tate and security consultant Ashkan Soltani spent four months analyzing more than 160,000 text messages, emails, social network exchanges and other communications sucked in by the NSA's surveillance programs. The material Snowden provided was associated with roughly 11,400 individuals, perhaps half of them Americans.
Of those whose lives were rummaged through, only 11 percent are identified by the NSA as legitimate targets who warrant surveillance.
It is important to clarify that I'm not talking about content-free metadata, such as the NSA's controversial log of domestic phone calls. These are actual emails, text messages and social media posts that the NSA gathered under surveillance programs known as PRISM and Upstream.
It's also important to note that the 11 percent deemed legitimate targets included some people I definitely want our spies to be watching. The Post said the surveillance records it examined included information that led to the captures of a Pakistan-based terrorist bomb-maker and a suspect in an Indonesian bomb attack.
My point is not that this surveillance is incapable of helping authorities find and apprehend genuine terrorists. I just believe the snooping should be more targeted — and clearly irrelevant information about innocent people should be quickly erased.
If NSA officials are so confident they can manage the unimaginably vast quantities of data the agency is assembling, then why have they repeatedly given public assurances that Snowden — whom they frequently describe as a lowly analyst — had no access to the kind of sensitive data he gave to the Post? Does the agency really have any idea of what is already in its databases? Does the NSA know who might be sifting through this material? And for what purposes?
These NSA programs are designed to snoop on foreigners. Snowden has expressed the view that citizens of other countries have privacy rights, too. You don't have to agree with him to wonder why the personal emails of, say, a college professor in Germany or an insurance salesman in Brazil should not be purged once the material is determined irrelevant to any investigation.
Snowden also believes there are legitimate threats and targets. He gave the information to the Post with the understanding that nothing would be published that could harm U.S. national security or endanger lives.
Indeed, the newspaper said it withheld details about "a secret overseas nuclear project, double-dealing by an ostensible ally, a military calamity that befell an unfriendly power, and the identities of aggressive intruders into U.S. computer networks."
Investigate that stuff, NSA. Stop wasting time and effort on people who mean us no harm.