I read this in the news recently:

"Consumer Alert: Beware of Programs Posing as Humans.

The Daemon-Enhanced LittleClock Information Upload System (DELIUS), is a web bot designed to pose as a human and randomly generate automated responses designed to analyze the susceptibility of forum participants' to procure useless acoustic products.
The program is designed to generate increasingly long strings of data inversely proportional to sales of products. This part of the testing is designed to identify the outlier participants who are likely to buy a product even after being beaten over the head with it.
Once those users make a purchase, they are called randomly by phone with a prerecorded message asking them to shoot themselves and report if they hear any noise. The lack of responses is then used as statistical evidence to make the claim that these products are effective in totally eliminating all noise from the environment and the known universe.

Law enforcement personnel are calling this the first salvo in a war between machines and humans. Police organizations are pouring over old suicide scene photographs to determine just how long this has been going on.
"So far we have found lots of clocks in pictures" said commissioner Gordon, who added "The introduction of cream was particularly clever as it ensures that the fingerprints of the victim overwhelm all other evidence at the scene, effectively forcing the incident to be ruled a suicide."