>If IM is specifically a way to get you immediately, start blacklisting people who can't get to the point and waste your time and have they go through email.
But of course they won't use email, they need the answer NOW. No, they'll come over to your desk and start tugging on your shirtsleeve.
I much prefer for people to visit, and to visit people. But it requires being able to take 'no' for an answer, and being able to say 'no'. Or at least, "I'm in the middle of something else; I can help you in 10 minutes. Otherwise, talk to Joe."
But of course they won't use email, they need the answer NOW. No, they'll come over to your desk and start tugging on your shirtsleeve.