Whip me with a wet noodle if you know this, but I did seem to remember that these seemingly random words are put into spam e-mails to confuse the engine that is trying to filter them. (Still puzzling why Hank's had no link or seeming purpose.)
Here's what our frequently unreliable but good-enough-for-this friend Wikipedia says:
"As Bayesian filtering has become popular as a spam-filtering technique, spammers have started using methods to weaken it. To a rough approximation, Bayesian filters rely on word probabilities. If a message contains many words which are only used in spam, and few which are never used in spam, it is likely to be spam. To weaken Bayesian filters, some spammers, alongside the sales pitch, now include lines of irrelevant, random words, in a technique known as Bayesian poisoning. A variant on this tactic may be borrowed from the Usenet abuser known as "Hipcrime" -- to include passages from books taken from Project Gutenberg, or nonsense sentences generated with "dissociated press" algorithms. Randomly generated phrases can create spoetry (spam poetry) or spam art."
So Hank, enjoy your spoetry or spam art.:)