This could very easily be used securely without wasting ink, I think ... the simplest prevention may be the best. If this were implemented, even in a public environment, it could be very easily controlled to prevent SPAM. Let's say a hotel has a courtesy printer in the business center, with a public email address, to be used in the method intended in this announcement. From some of the comments, nothing could be asking for abuse more clearly ... BUT, if the printer received an email to be printed, rather than just PRINTING IT, a simple LCD message of: "Print job received via email, press CONFIRM to print now." and if CONFIRM isn't pressed within [timeout threshold], the message is purged from printer storage and NOT printed. Seems pretty simple, I might create a printer line myself doing just this if HP gets it wrong ... you saw it first on Slashdot. Seems like a great idea....