Here's why I get frustrated sometimes.

Five or six months back I received a vague request for some numbers from - well, I'll skip snide comments about poster-children for inbreeding and just say that the request came from one of our other offices.  Here is a (paraphrased) summary of the exchange.

Them: Aaaaah!  (Much arm waving and frantic "woo woo woo" sounds.)

Me: I have no blessed idea what you are asking for here.

Them: Here are some badly-worded, ambiguous specifications for what we need.  By the way, this is urgent because we are being audited on these numbers.

Me: What numbers?  What are you asking me for?

Them: As stated above, we want rainbows and buttercups.

Me: (after nearly a week of fighting to get the data they need) OK, here are your buttercups and rainbows as requested.

Them: Ack!  We asked for rainbows and buttercups, not buttercups and rainbows.

Me: ...

Them: Oh wait, if we flip the sheet over it looks more like what we wanted.

(a month passes)

Them: Why do these numbers not match up with our expected results?

Me: That is because your expectations were unrealistic, and based on fallacious premises.

Them: OK.  No, not OK.  Why don't our numbers match?

Me: I... don't know how to answer that.  This conversation is now over.

(About six months pass)

Them: Hello, it's us again.  Rather it's the auditor from the accounting firm.  These numbers don't match, but I think it's because you gave us buttercups, but we needed peanut butter cups.

Me: Argh!  Why are you people still talking?  I clearly said that this conversation was over.  I'll make a deal with you.  I'll send you the peanut butter cups if you promise never to call me again.

Them: We promise.

Me: For real?

Them: For real!

Me: Good.  Now give me the details about these peanut butter cups.

Them: On second though, maybe it was Dixie cups...