This is a universal problem, I fear. We have any number of users at work who feel that it's perfectly OK to call my direct number to ask me a technical support question that, by rights, was supposed to have been emailed to the helpdesk (which I am not a part of, or at least wasn't until October). Some people just prefer to use the phone. I think it's because they feel that they're personally more important that the rest of us, or that their situation is sufficiently dire (kinda like that one person who always sends every mail with "Priority: High" set on it) as to justify the use of excessively intrusive means of communication.
Heh. One of my quadmates senior year called an IMSA math prof at around midnight for help with Mathematica. She wasn't asleep, but damn. Speaking of which... are you teaching CS142 next term? *evil grin*