I wonder if these apply to blog entries too… Sometimes I just put “foo” in the subject line coz it’s hard to think of an appropriate one… I used to use no caps but I don’t do that as often now.
I do hate people who add addresses to the CC field, don’t they realize I do know them and there was a good reason why I didn’t include them in the first place. I also have an extra header in all of my personal email messages that looks like this:
X-Copyright: (C) 2005 Andrew Y Ng. Forwarding not permitted without prior permission.
But most people don’t know shit about hidden headers and would care less about quoting or forwarding my mails without my permission.