Quoting this article:

http://www.dailymail.co.uk/news/article-4042194/Facebook-fact-checker-arbitrate-fake-news-accused-defrauding-website-pay-prostitutes-staff-includes-escort-porn-star-Vice-Vixen-domme.html

"In others posts, LaCapria claimed to be 'addicted to smutty HP [Harry Potter] fanfic.'"

It appears that many of the HP fanfic stories involve sexual relationships between adults and children.

More from the article:

"One of the lead fact-checkers, Kim LaCapria, has also been a sex-and-fetish blogger who went by the pseudonym 'Vice Vixen.'

She described her blog as a lifestyle website 'with a specific focus on naughtiness, sin, carnal pursuits, and general hedonism and bonne vivante-ery.'

She regularly provided intimate advice and reviewed sex toys, including a vibrating wand that 'drives boys mad.'"

There's your arbiter of truth.