Beginning in the mid-2010s, significant discourse emerged within fan spaces such as Tumblr and Archive of Our Own (AO3) regarding the ethical implications of portraying taboo and abusive sexual content within shipping fanfiction. "Shipping"—the depiction of a romantic or sexual relationship between fictional characters—has long been a staple within fanfiction. The lack of censorship emerging from spaces such as AO3 allowed for the portrayal of disturbing or taboo dynamics within fan works, including incest, abuse, rape, and pedophilia.
Fandom discourse is divided between "anti-ship" and "pro-ship" camps, focusing primarily on the extent to which fictional works depicting such content affect real-world behavior and attitudes. Anti-shippers, referred to as "antis," take the view that fictional portrayals normalize harmful dynamics and behaviors and pose a particular threat to children. Fanfiction depicting underage characters in sexual contexts is characterized as child pornography. Pro-shippers oppose antis on a variety of stances, including opposition to censorship and the rejection of notions of fictional abuse affecting reality. Both anti- and pro-shippers draw from primarily LGBT fan communities and share similar demographics, although antis are generally younger, with the largest contingent in their early-to-mid teens.
Academic coverage generally disputes antis' claims regarding fictional works, analyzing the movement as a moral panic, harassment campaign, or "faux-activism." Antis have been criticized for equating fictional content with real-world sexual abuse, online harassment of pro-shippers, as well as the spread of moralistic and pathologizing attitudes towards kink and sexuality. The pro-shipper backlash has also faced criticism, primarily for minimizing other critiques of fan works by placing them under the label of anti-ship.