Do SPAM messages carry illicit messages?

At the other end of the building, in the conspiracy theory nut-case ward, lives M and he often has intersting ideas. He is rapidly opposed to SPAM-mail and forwards it all with fiendish delight to the government's anti-spam reporting site. In the dead of night he can be found sitting before a small computer screen. Cries of 'Take that!"....proceed the dooming of the spam mail into a government cyber-hell. The other night though he was a bit distraught. He kept muttering that some of the spam mails had strange...ominous... messages tagged on the bottom of them...coded almost...M kept us all awake that night with visions of terrorists using emails to send coded instructions.... X suspects that the emails are originating from the same place his socks disappear to after being placed in the laundry as a pair and where the US MAIL's lost letters really go.......