Should any monastic be considered a noble one and treated as such, to abstain from bad kamma, (at the minimum), or are lay people, and other monastics, free to use personal judgement based on the personal qualities (or lack thereof) of any given monastic?

If no, am I free to express my attitude, without producing excessive bad kamma, such as not agreeing with the way the Dhamma is presented, or not agreeing with the arrogant attitude of the monk, or pointing out flaws in the behavior and/or points of view of the monk? etc