Japanese readers....

[~Naruto&Itachi~]

what does it say on naruto's and kakashi's head?

Spoiler

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[Pumpkin Ninja]

Lol, there are none here.

 

[Hikigaeru]

I was watching a review and the person said that it meant "Shitty Father"
also with the One Piece Reference on the forehead.

 

[SSU]

Well to the left of the panel it says "moron" so..

 

[Jennifer Lawrence]

It tells you :|
Shitty Old Man and Moron

 

[Angelic.]

*********** has the translations for the graffiti

 

[AaaaNinja]

アホ - aho
クソ オヤジ - kuso oyaji　

You can plug those into Google translate. Go ahead. Do it.

 

[Cael]

It tells you :|
Shitty Old Man and Moron

this, its in the margin between the picture.