Donna at Copyfight points to a feature about EFF co-founder John Gilmore and his refusal to show photo id at the airport. Security guru Bruce Schneier has already discussed one reason why photo identification is flawed as a security measure.

In terms of security, this is no big deal; the photo-ID requirement doesn't provide much security. Identification of passengers doesn't increase security very much. All of the 9/11 terrorists presented photo-IDs, many in their real names. Others had legitimate driver's licenses in fake names that they bought from unscrupulous people working in motor vehicle offices.

There are two aspects of security at play here: authentication and authorization. Authentication deals with proving you are who you say you are; Authorization is determining whether that person is allowed to do something. When your authentication fails, it basically renders any attempt at authorization useless.