Yourself, Being

Librarians should not use the library's anonymous "instant message" reference service to get a colleague to do their work for them.  While it might be easy to pass off an emailed reference question or request a copy of a hard-to-find article, your cover will likely be blown when you ask them to write your annual review for you.

Embarrassment, Avoiding

Never let your mother find out that your library has an Instant Messenger service at the reference desk.