Does everyone really need to get the mail you are about to send? Do you really intend to "big-R" as opposed to "little-r" or maybe even "slightly-less-big-r"?
I removed the "Reply All" button from the toolbar and the right click menu on one of my machines. After two weeks I can say that this should be to the default setting for outlook. The reply all button is still there... its just I have to go into a menu to get it. This makes you think a little more about using this "spam command".
Just another idea that might help cut off e-mail clutter at it's source.