you know you're addicted to Naruto when you get body spray and then light a lighter, then pretend to do hand signs before you activate the lighter and the body spray, then you say Katon Goukakyuu No Jutsu! (Fire Style: Grand Fireball jutsu) and ignite the lighter, and spray it like a flame thrower.
You know your addticted to Naruto when you try to kill your best friend because you want a better sharingan.
You know your addicted to Naruto when you position yourself so that your shadow touches someone and then try to make them pick their own nose.