On the one hand, Snapchat shouldn’t be liable for users’ actions.
On the other hand, Snapchat absolutely should be liable for its recommendation algorithms’ actions.
On the third hand, the kid presumably lied to Snapchat in order to get an account in the first place.
On the fourth hand, the kid’s parents fail at basic parenting in ways that have nothing to do with Snapchat: “If you get messages on-line that make you uncomfortable or are obviously wrong, show them to a trusted adult—it doesn’t have to be us.” “If you must meet someone you know on-line in person, do it in the most public place you can think of—mall food courts during lunch hour are good. You want to make sure that if you scream, lots of people will hear it.” “Don’t ever get into a car alone with someone you don’t know very well.”
Solution: make suggestion algorithms opt-in only (if they’re useful, people will opt in). Don’t allow known underage individuals to opt in—restrict them to a human-curated “general feed” that’s the same for everyone not opted in if you feel the need to fill in the space in the interface. Get C.O. better parents.