This, combined with a polite [EOM] tag, makes subject-messages much more rapid than writing a full email. I have much more rage at people who type e-mails with nonsensical subject lines that are just as long than their body content.

Would you rather have someone email you with:

1) Subj: Can you print an extra copy of the Excel for 10AM? Thanks! [EOM]

2) Subj: Quick request for you before our meeting today Body: Can you print an extra copy of the Excel for 10AM?

Personally, I much prefer the first.