I've suddenly started seeing this ridiculous line in the signatures of multiple people (usually not scientists: these are usually bureaucrats):
*Please consider the environment before printing this email*
So, now to the list of things I never imagined possible: there must be people who actually print out their email. People to who think it is necessary and useful to tell other people to not print out their email. People with enough time on their hands to set up a signature in color. Wow!