Of course, that naturally leads to the crazy idea: “What if I can
personalize my signatures?” Knowing that Paul Lussier is an Emacs geek, I can reward him for reading all the way
to the bottom of my message… ;)

(defun sacha/gnus-personalize-signature ()
  "Personalizes signature based on BBDB signature field.
BBDB signature field should be a lambda expression.
First person with a custom signature field gets used."
  (let* ((bbdb-get-addresses-headers
          (list (assoc 'recipients bbdb-get-addresses-headers)))
         (records (bbdb-update-records
                   (bbdb-get-addresses
                    nil
                    gnus-ignored-from-addresses 'gnus-fetch-field)
                   nil
                   nil))
         signature)
    (while (and records (not signature))
      (when (bbdb-record-getprop (car records) 'signature)
        (setq signature
              (eval (read (bbdb-record-getprop (car records)
                                               'signature)))))
      (setq records (cdr records)))
    (or signature t)))
(setq-default message-signature 'sacha/gnus-personalize-signature)

So then all I have to do is add the following field to his record:

      signature: (concat "Sacha Chua - Emacs geek
                 What crazy idea can I help you hack next?
                 Random Emacs symbol: "
                 (sacha/random-tagline
                  "~/.taglines.random-emacs-symbols"))

Emacs. One crazy idea at a time. Now I can use this to select random
information, like my favorite networking books or a list of my
upcoming events…

Random Emacs symbol: sort-coding-systems-predicate – Variable: If non-nil, a predicate function to sort coding systems.