[enraged_camel]

>>That's why Facebook's image albums don't automatically move to the next image after five seconds.

Well, now that you opened your big mouth... :)

Aside from showing upper management that their latest bullshit idea is on the website, carousels also serve another purpose, which is to make the website look "alive" and "dynamic" and "interactive." And that's just the tip of the buzzword iceberg.

Ultimately it is one of the many symptoms of a very common phenomenon: design decisions made by people who don't know anything about design. In most cases these people are directors and C-level executives.