since the 1970s has been the recurring rumor that the Procter & Gamble Company was associated with Satan-worshippers because of details within its nineteenth-century "57" trademark. The legend interrupted the company's business to the point that it stopped using the trademark. Relation to mythology The earliest term by which these narratives were known, "urban belief tales", highlights what was then thought of as a key property: their tellers regarded the stories as true accounts, and the device of the FOAF (acronym for "Friend of a Friend" invented by English writer and folklorist Rodney Dale in 1976) was a spurious but significant effort at authentication. The coinage leads in turn to the terms "FOAFlore" and "FOAFtale". While at least one classic legend, the "Death Car", has been shown to have some basis in fact, folklorists have an interest in debunking those narratives only to the degree that establishing non-factuality warrants the assumption that there must be some other reason why the tales are told, re-told and believed. As in the case of myth, the narratives are believed because they construct and reinforce the worldview of the group within which they are told, or "because they provide us with coherent and convincing explanations of complex events". Social scientists have started to draw on urban legends in order to help explain complex socio-psychological beliefs, such as attitudes to crime, childcare, fast food, SUVs and other "family" choices. The authors make an explicit connection between urban legends and popular folklore, such as Grimm's Fairy Tales, where similar themes and motifs arise. For that reason, it is characteristic of groups within which a given narrative circulates to vehemently reject claims or demonstrations of non-factuality; an example would be the expressions of outrage by police officers who are told that adulteration of Halloween treats by strangers (the subject of periodic moral panics) occurs extremely rarely, if at all. Documentation The Internet has made it easier both to spread and to debunk urban legends. For instance, the Usenet newsgroup alt.folklore.urban and several other websites, most notably snopes.com, focus on discussing, tracking, and analyzing urban legends. The United States Department of Energy had a now-discontinued service called Hoaxbusters that dealt with computer-distributed hoaxes and legends. The most notable such hoaxes are known as creepypastas, which are typically horror stories written anonymously. Although most are regarded as obviously false, some, such as the Slender Man, have gained a following