I was re-reading Lazlo Zalezac's "Service Society" and ran across some words worth quoting when discussion/arguments get too intense.
"Group discussion by email is a horrible use of that technology. It is just not suited for a group discussion. The tone of the emails can quickly degrade into harsh words, and outright insults. One email can generate a bunch of disconnected replies. All of a sudden, you're trying to piece together a hundred different threads. Nothing makes sense. Arguments break out."
Lets be friendly. If we can't be friendly, at least be polite.