Margery Eagan of the Boston Herald has done it again. She’s unleashed her deathless prose filled with soaring rhetoric and high concepts all revealing her infinite sagacity. OK, that was just sarcasm. In truth, Eagan has given us another example of the sort of low-end, guttural, sputterings that we have become so used to seeing drip like sour milk from her pen. Her latest Boston Herald piece is a prime example of the unprofessionalism that pervades her work.