SAN FRANCISCO: Facebook on Friday (Saturday in Manila) set out to block people from using the leading social network and its Instagram photo-sharing service for private gun sales. Although Facebook doesn’t participate in outright gun sales, it has been a forum for negotiations, and it intends to put an end to that. The California-based social network updated its policy for managing regulated goods to prohibit people who aren’t gun dealers from using Facebook to offer guns for sale or negotiate private sales of firearms. The policy change will not affect licensed gun dealers who tout their wares on the social network, which is used by 1.59 billion people monthly. Facebook has similar restrictions on regulated goods such as prescription and illegal drugs.