Just how much should we worry about privacy?

Nearly daily incidents demand that we as a society redraw the line between our private lives and our public personas. The "public" is that part of us found in public records, subject to examination by government or disclosure in news reports, or that we expose ourselves.

The vexing problem of public versus private isn’t new, but new technology and new methods of communication raise new concerns. How new? A column this week in the New York Times by Columbia University law Professor Tim Wu raised the issue of privacy concerns for nearly sentient computers — machines that think so much like us they would have Constitutional rights.

Closer to immediate reality, we see such situations as police officers arresting citizens for videotaping incidents in public.

Then there are companies employing new ways to find public documents about us. Social networks such as Facebook invite us to post messages, then harvest data from our most-personal moments. And government carries out Orwellian actions in the name of national security.

Some — count Facebook founder Mark Zuckerberg among them — say online privacy, at least, is a fading ideal. Around two years ago, he told an Internet conference that such a concept no longer applied to younger people: "People have really gotten comfortable not only sharing more information and different kinds but more openly and with more people."

Choosing to post that embarrassing weekend photo or update your "friends," and thus the World Wide Web, on the progress of your airline trip may well just be "sharing."

And while Facebook and other social networks are massive, pervasive, and perhaps intrusive, they are not government with its powers over life and liberty.

Our nation’s founders determined right from the start — just after safeguarding the rights of free speech and free press in the First Amendment — to restrict by the Fourth and Fifth Amendments the government’s right to pry into our lives through "unreasonable searches and seizures" or to compel testimony against ourselves.

But those amendments generally come into play when crime is involved. What about the privacy of law-abiding folks who want to keep as private — or at least control the disclosure of — most facts about them?

Ninety-nine years to the day after we got the Bill of Rights, on Dec. 15, 1890, a landmark Harvard Law Review article set out a "right to be let alone," written by two lawyers, Samuel Warren and Louis Brandeis. In 1928, as a U.S. Supreme Court justice, Brandeis set out the principle again in dissenting from a majority opinion in a wiretap case, Olmstead v. U.S.

Modern readers, please insert news media, new media — social networking and automatic online sharing — along with i-Pads and cell phones, at the appropriate places.

Gossip is no longer the resource of the idle and of the vicious, it has become a trade which is pursued with industry as well as effrontery. To satisfy a prurient taste, the details of sexual relations are broadcast.

To occupy the indolent, column upon column is filled with idle gossip, which can only be procured by intrusion upon the domestic circle.

Attention cable-TV talking heads, celebrity trackers, and paparazzi: Two guys in the Victorian Age had your number.

Still, there are things about each other we need to know to function as a nation.

We should consider all those benefits in weighing attempts to shut down the flow of information.

Still, there is the echo through time of the concerns that prompted Brandeis and Warren to write:

"Solitude and privacy have become more essential to the individual; but modern enterprise and invention have, through invasions upon his privacy, subjected him to mental pain and distress, far greater than could be inflicted by mere bodily injury."

You could post that on Facebook.

Gene Policinski