Yet again, the War on Terror™ rubric serves as an effective justification for nearly anything that might infuriate libertarians, however tangential such a connection may be.

From "High Court Rules on Police ID Requests", the Associated Press, June 21, 2004:

The Supreme Court ruled Monday that people do not have a constitutional right to refuse to tell police their names.

The 5-4 decision frees the government to arrest and punish people who won't cooperate by revealing their identity.

The decision was a defeat for privacy rights advocates who argued that the government could use this power to force people who have done nothing wrong to submit to fingerprinting or divulge more personal information.

Police, meanwhile, had argued that identification requests are a routine part of detective work, including efforts to get information about terrorists.