In another example of digital etiquette I have seen group members openly scold others and copy multiple parties. That doesn't strike me as a prudent means to communicate a point. The need of the sender is to either clarify a point or to pose a question about what the sender meant. If this specifically refers to intra-group policies why not pick up the phone?
There has always been the claim that email makes quick work of such interactions. It's very central that we think of the end result and if that will fulfill our need. If an individual has 5 minutes to craft an email there exists just as much time to add a highly personal touch and make a call. It's much more appropriate, in fact, if any criticism is overtly negative. We all know how easy it is to misinterpret anything which is strictly textual. Tone, meaning and underlying subterfuge are very easily lost on the reader.
Copying other parties on such messages is not only unecessary, but also belittling. Even in person, the question can be put forth to the sender within the same group in a tone that evokes care and empathy. Emails can be read as cold, uncaring and why would anyone risk that chance? Group cohesion can be very difficult to build and once you spend the social capital that keeps this high, reinvestment may not be worth the effort.
