As for me... I will post my friend code in my sig (trainer card) since it can hold it, which makes it look cool, because even if someone types my "FC" in their game, they would not find me on my game, unless "I" have added them as well, so that means, either way, you have to let me know to add you if you want to see me on wi-fi, other than that, if you add me and I don't add you, you will just be wasteing a spot in your friend book, which can only hold "32"(?) people I believe, something like that, just know that it has a limit.