Well this could be a long thread. My favourite which I think I have posted many times on FT is this response I got to a question I asked on their webpage (original here):

Dear Madam, Sir,

We are sorry to inform you that due to unforeseen weather conditions at Schiphol airport over the
last days we were unable to provide you with a reply to your previous email.

Should you still require an answer to your previous question, we would
kindly ask you to send a new email to us via the contact button on our
website at www.klm.com

The contact button can be located on the left hand toolbar.

Please do not automatically reply to this email as we cannot answer such
replies.

Thank you and please accept our apologies for any inconvenience caused.

Yours sincerely,

KLM/Northwest Airlines

Ok to send out an email that my answer will be delayed, but to delete because of bad weather?? It is like they are thinning among their emails to see who are really persistent. This email pretty much convinced me to leave FB.