Should the government have issued search warrants to find out who published the Pentagon Papers? What if Gizmodo published them?
For one thing, the publishers of the Pentagon Papers--the New York Times and the Washington Post--were discovered through the clever ruse of visiting a news stand, so I would say that a search warrant would have been a tad overkill.
Second, the publishers of the Pentagon Papers benefited the country by disclosing secret information that showed government deception and secret unconstitutional acts, including the illegal carpet bombing of Cambodia and Laos, facts the citizenry was entitled to know.
Third, the publishers of the Pentagon Papers committed no act other than the disclosure of facts made known to them. They didn't participate in a theft, burglary, or tort in order to obtain the information they received.
Fourth, although the U.S. Supreme Court voted to overturn the injunctions against the publishers as being a prior restraint, there were multiple written opinions, and there was no sweeping declaration of the unbridled license of the press.
Fifth, even though the publishers were permitted to publish and never further prosecuted, Daniel Ellsberg who provided the material to Congress and to the newspapers, was indicted and charged with federal crimes carrying a penalty of more than 100 years in jail. His case never reached a jury because a mistrial was declared due to government misconduct. His only alleged wrongful act was the disclosure of government secrets.
You'd have to go a very long way to see much of a connection between the country's two leading newspapers and a principled government employee on the one hand, and someone who stole a nongovernmental cellular phone and someone who received stolen property and posted about it on the internet on the other. The overarching need of a free society to know the truth about its government's actions is not quite on par with Apple enthusiasts' need to know about forthcoming gadgets. Nonetheless, the courts probably would not enjoin Gizmodo from publishing the secrets of the 4G iPhone, although not muzzling the press is the only price our law is willing to pay to support its freedom. If the press commits a crime in order to get a story--breaks into someone's office, steals someone's briefcase, water-boards a "source" to get a scoop---all bets are off. A press pass is not a license to violate the rights of other citizens.
We ardent supporters of the freedom of the press need to be very careful about just what sort of behavior we argue should be protected. If unscrupulous "journalists" use the privilege as a sword instead of as a legitimate shield to fulfill a public trust, it won't be long before an angry public and its lawmakers abolish the privilege entirely.