A lot of programs and systems like producing warning messages in variouscircumstances, or just informative messages. Sometimes the authors ofthese systems are surprised when sysadmins have very grumpy reactions tothose messages. Fortunately, I have realized that there is a very simpleand general rule about when your messages will irritate sysadmins andwhen they won't, and it even ties into current jargon:

You should only produce actionable messages (by default).

An actionable message is a message where a sysadmin can and in factshould take some