979
The mystery has been solved
(kbin.melroy.org)
People tweeting stuff. We allow tweets from anyone.
RULES:
I hate that. Also in a business setting. By definition a message (be it text, email, whatever) is not urgent. They might be important and of course you shouldn't leave them unread for days, but for urgency there's calls.
I always perceive an IM as high but not immediate importance, an email as "get to it when you can", and phone call as immediate.
The older people I work with tend to call for email level things.