No, I'm not talking about HAL's SoE program. I'm talking about the thing people stick at the end of e-mails and forum posts as part of their signature. You know the ones. For correspondence from us, it's:

CruiseSavvy.com: Learn, share stories, and find the right cruise for you

Well, lately I've been seeing a lot of environmental ones, like:

Save a Tree. Please do not print this email unless you really need to.

That one is from a cruise line. I'm surprised to hear this actually needs stating, but okay, fine.

Well, today I got a really funny one (from the CEO of a London software firm):

Please consider the environment - do not print this e-mail unless absolutely necessary! Also, we recommend that you never use your computer monitor at more than 60% brightness to save electricity (unless you are working in a very bright environment, in which case you should turn down the office lights or draw the blinds on your windows). Please also turn down your heating and put on a sweater or turn down the air conditioning and take off your jacket, as the case may be. Traveling to and from work by public transportation (or walking or cycling depending on distance and circumstance) has been shown to significantly reduce the modern office worker's carbon footprint, as does becoming a vegetarian. Wasting company time by reading this email signature may force the company to hire more people and therefore double the carbon footprint your job should have taken (plus it will make the company generally more uncompetitive and hence more wasteful) so do not read this message.

The emphasis is mine. The amusement is shared.