At the height of his bardic powers, Allen Ginsberg could terrify the authorities with the mere utterance of the syllable “om” as he led street throngs of citizens protesting the Vietnam War. Ginsberg reigned as the raucous poet of American hippiedom and as a literary pioneer whose freewheeling masterwork “Howl” prevailed against government censorship in a landmark obscenity trial 50 years ago.

It is with a queasy feeling of history in retreat that poetry lovers discover that WBAI, long the radio flagship of cocky resistance to government excess, decided last week that it couldn’t risk a 50th anniversary broadcast of the late poet’s recording of “Howl.” The station retreated out of fear that the Federal Communications Commission would levy large obscenity fines that might bankrupt the small-budget station.