Lots of Democrats now concede that Congress overreacted a bit after the 9/11 terrorist attacks to give sweeping authority to the FBI to conduct various kinds of sneaky searching and snooping without the usual kinds of reasonable suspicion of criminal wrongdoing normally required. But Democratic lawmakers can’t seem to agree whether the terrorists ever really act alone.

The whole idea of lone wolves prowling the forest seeking to attack innocent Americans apparently sprang up after some Republicans claimed that the FBI hadn’t been able to access the computer of Zacharias Moussaoui, the alleged 20^th hijacker, because it couldn’t connect him to a known terrorist group. The Foreign Intelligence Surveillance Act, or FISA, requires the government to show that the target of surveillance has some connection to a foreign terrorist group in order to obtain a warrant. In response, the “lone wolf” theory — together with section 6001(b) of the Patriot Act — was born.

But in 2003, as Julian Sanchez writes in Reason magazine, the Senate Judiciary Committee revealed that in fact, the FBI’s failure to get a warrant wasn’t because Congress hadn’t believed in and adequately prepared for lone wolves, but because the FBI had failed to connect the dots: related reports from different FBI field offices that should have alerted any reasonably informed FBI agent that Moussaoui was linked to terrorism were ignored, and the FBI failed to use the powers it had. Still, Congress went ahead and granted it more.

Now, under its “lone wolf” provision, the Patriot Act “appears to permit ‘lone wolves’ to be targeted merely on the basis of advocacy,” writes Sanchez. “Finally, while the criminal law requires ‘preparation’ for terrorism to include a ‘substantial step’ in the direction of carrying out an attack, the Justice Department has suggested that FISA’s definition does not. Thus, not only may lone wolf suspects be monitored despite the absence of ties to a terror group, they may not even need to be engaged in criminal conduct.”

At a recent Senate Judiciary Committee hearing, Justice Department official David Kris acknowledged that the FBI has never actually used the “lone wolf” provision, but insisted that it’s necessary in case it decides it needs it in the future.

The purpose of FISA, of course, is to expand law enforcement’s surveillance powers beyond what they can usually use to monitor ordinary criminal suspects. But Sanchez argues that the “lone wolf” provision seems to blur that distinction: “The lone wolf provision effectively aims a Howitzer at a gnat, allowing souped-up tools designed for Al Qaeda and the KGB to be used against people more reasonably seen as criminal suspects-and in the process, against any Americans who happen to have interactions with them.”

Judge Vaughn Walker in San Francisco dismissed the cases because Congress explicitly gave the telecom companies immunity from civil suits in a 2008 amendment to the Foreign Intelligence Surveillance Act, or FISA.

Although the customers who sued, represented by the Electronic Frontier Foundation and the American Civil Liberties Union, claimed that the immunity provision of the law was unconstitutional, Judge Walker disagreed.

Significantly, however, he noted that at least one part of the argument presented “a close question,” leaving open the possibility that his decision could be reversed on appeal.

The lawyers who brought the case said yesterday that they plan to pursue that course.

“We’re deeply disappointed in Judge Walker’s ruling today,” Cindy Cohn, legal director of the Electronic Frontier Foundation, told Keith Perine at CQ Politics. “The retroactive immunity law unconstitutionally takes away Americans’ claims arising out of the First and Fourth Amendments, violates the federal government’s separation of powers as established in the Constitution, and robs innocent telecom customers of their rights without due process of law.”

Judge Walker also specifically wrote that his decision in the case against the telecoms does not foreclose other cases based on similar facts filed against the government.

“The court agrees with the United States and the telecommunications company defendants on this point: plaintiffs retain a means of redressing the harms alleged in their complaints by proceeding against governmental actors and entities who are, after all, the primary actors in the alleged wiretapping activities,” Vaughn wrote.

Meanwhile, in a separate ruling in the Al-Haramain case, Judge Walker ruled that the defunct Islamic charity can proceed with its case against the government even without the document that the Obama administration has been trying so desperately to conceal. That document — which the government inadvertently disclosed to Al-Haramain’s lawyers — establishes that the organization was wiretapped, its lawyers say.

A hearing on the merits of the case — whether the government broke the law when it wiretapped Al-Haramain and its lawyers without a warrant — is scheduled for September 1.

A ruling from Judge Walker last July that the president lacks the authority to disregard the Foreign Intelligence Surveillance Act, or FISA, does not bode well for the government.

Jon Eisenberg, Al-Haramain’s lawyer, summed it up at the time this way: “Judge Walker ruled, effectively, that President George W. Bush is a felon.”