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

If the latter, then am I free to verbally express my concern/blame, without producing excessively bad kamma? For example due to not agreeing with the way the Dhamma is presented, or timing thereof, or not agreeing with the arrogant attitude of the monk, or pointing out flaws in the behavior/methods/views of that monk?