In my mind, order serves no purpose, so requiring it is purely egotistical. That being said, overly egotistical people aren't exactly a rarity in the business world. And the minute _one_ person says it matters, other people start thinking it does too (because someone else might see it that way, and it reflects on them).
I just could not figure out how to write code and distribute it in outlook ... not that I tried hard
Also "cc" is rarely used where I worked and was mostly then used to inform the people in cc about the issue, they aren't required to do something.