>"While parents focus on Facebook and Twitter, children often turn to apps that allow users to remain anonymous, aren't moderated, and that adults have never heard of."Anonymous apps like YOLO, Whisper, and the now-defunct [Ask.fm](http://Ask.fm) have been linked to cyberbullying, pedophilia, unsolicited sexual image sharing, and even child suicides. Concerns over these apps largely focus on their anonymity, because they let people talk with limited accountability. But they’re also risky because they usually become popular by surprise. Such anonymous apps often gain popularity beyond their founders’ wildest dreams, leaving them unprepared to scale their content moderation enough to protect their largely young userbase.