How Akatsuki could have found Naruto.

[Reso Miso Soup]

Serious answer: The Legend of the Nine Tails Foz is quite famous >.> any traveler from Konoha would have let it slip to anyone and then information travels faster in the modern age~

Non-serious answer: THEY FOUND OUT ABOUT HIM FROM THE INTERNET! xD  

[churrlo]

xd I'm really surprised it was kept as such a well known secret for so many years. I'm sure a lot of people knew of it and spoke of it... as long as Naruto didn't find out, they had nothing to fear.