> And why is it netiquette to have line breaks instead > of line wrapping client-side?
I think someone has just volunteered to submit an RFC on how to send electronic mail between computers with a multitude of different architectures and screen sizes on the internet in the 21st century. Because, you know, the problem hasn't already been dealt with before, and the people who never dealt with it in the past have no reason for saying that things are best done in a certain way in the present.