Source: Wikipedia https://en.wikipedia.org/wiki/Hit-and-run_posting
Hit-and-run posting
Hit-and-run posting refers to a tactic where a poster at an Internet forum enters, makes a post, only to disappear immediately after. The term comes from the hit-and-run crime with auto vehicles, in which the driver hits another car or person causing an accident and then flees the scene. It is also known as making a “drive-by” posting, a play on the phrase drive-by shooting. The post often consists of a lengthy text making lots of claims that can be, but are not always, on topic.