If high schoolers were to do this, it would be best to have a chaperon come along. Otherwise, if you're college and you're with a group of at least 4 people, then you're fine. Otherwise, use common sense. And no personal information would be given out. You're just trading something. Just be cautious of what you're trading and all that. Make sure to do this in a well-lit neighborhood, or at least where you know where your friends live. That way, it won't be as dangerous or strange to neighbors (that's why this game is more geared to college-age students).