Facebook prohibits gun sales on its service. But buyers and sellers can violate the rule 10 times before they are kicked off the social network, according to internal guidance obtained by The Washington Post. The policy, which has not previously been reported, is much more lenient than for users who post child pornography, which is illegal, or a terrorist image, which prompts immediate removal from the platform. A separate, five-strikes policy extends even to gun sellers and purchasers who actively call for violence. Facebook's gun policies have long been a source of contention among the company's senior leadership and policymaking teams, who have been torn between the platform's support of free speech and public pressure to curtail weapons sales. Gun sellers have seized on loopholes within Facebook's policy. Journalists have repeatedly uncovered strategies sellers use to evade bans while reaching potential customers in dedicated Facebook groups or on Facebook Marketplace, the company's classified services. One tactic is advertising gun accessories, like holsters or cases, which are permitted for sale on the platform; once a customer contacts the seller, a gun can be sold in Facebook's private messages. After responding to several listings for gun cases, a Post reporter received three private messages with offers to purchase a gun. Joel Kaplan, vice president of global public policy ... said that banning transactions of a product that was both legal and highly popular would alienate the political right.