Boing Boing has this breathless charge:
Professor Walter F. Murphy, a Korean war hero and McCormick Professor of Jurisprudence (emeritus) at Princeton, was delayed while flying because he’s on a “terrorist watch list.” The check-in clerk told him that he was probably added because he gave a speech that was critical of the president (who dodged his military service).
First check-in clerks are not government employees. They no knowledge of who is on the No-Fly List and if so why.
For a sober analysis, read James Taranto, Best of the Web.