Age is a big one, as can be the type of relationship desired.
"Going to the prom is about seven years away," she wrote in a widely-circulated essay about the online dating life of tweens last week.
"This site is for younger children, and we do a lot of things to stop that sort of behavior for the audience," he said, when asked about dating within Club Penguin.
Ultimately, stopping predators from grooming children is much more important than preventing kids from pretend dating.
Virtual worlds like Fantage are fun, innocent, bright-colored versions of the massively-multiplayer online games that teenagers and adults play.
They also unintentionally function as online dating sites for the elementary and middle school set.
Club Penguin is one of the most popular kiddie worlds with around 200 million registered users and an average age between 11 and 12, according to KZero.