"Do not CC me"
I see many note in this list like:
"I'm registered to the list. So please *do not* Cc: me."
So I'd like to note:
1. Some e-mail cleints make it hard not to CC. For example GMail has only two options: reply and reply to all. "Reply" will send email to the author, not to the list
2. Some email cleints are smart enough to guess that CC and list email is the same and will not duplicate it