In a world of ever increasing email communication ideas can get easily lost in CC bundling. That's especially true when someone is trying to pitch a new idea or move a group of people. If possible, these kinds of conversations should take place one on one, a phone call perhaps.
What might happen if a group of folks is copied on a pitch email is that criticism becomes public and that can be demeaning. If there is a particular member of a group that needs to be spoken to about a policy it's good practice to send that person, and only that person, the message.
If there's a negative response, at least it's confined to two people. Once they hit "reply all" the initital intent of the email might get drowned out in any emotional or self interested responses.
As a side note an idea is to always respond to these types of emails to the entire group. Instead of replying as is, i.e. sent to one person and everyone else is carbon copied, move all recipients to the top and remove the CC's. That way, the message isn't targeted to one person with everyone else just "listening in." That creates a more lateral conversation so all the ideas can be heard without making anyone feel singled out.
