"Powerful." Like local newspapers, their reporters and Opinionatores that "feel compelled to expend substantial efforts engaging them and responding" to their critic's "criticisms of their work"? Glenn's point, if they had any personal integrity or loyalty to the truth, they wouldn't need to defend themselves, now would they?
1. adherence to moral and ethical principles; soundness of moral character; honesty.
2. the state of being whole, entire, or undiminished.
3. a sound, unimpaired, or perfect condition.