We have it in alliances, why we cant broadcast for friends? trade etc

+ less important and useful:
- groups of buddies

Cause not everyone in your friendslist trades?
Don't know why it is not in the game, but I think there is a good reason for it. I don't see any potential in it either.

I think it's a good way to expand the message system. This wil probably result in more communication and more use of the buddylist.

Moved to Suggestions for Next Improvements as New Message System Suggestion
Nice idea, btw