EDIT: I'll rename this something less fucking retarded later, I'm just having myself a crapshoot here.

Okay then, let's start this off nice and well-formatted so you folks can grok this all, savvy? Right.

First off.
What the fuck is a roleplay?
I'm glad you asked. The driving idea behind a roleplay is collaboratively writing a story generally overwatched by the creator of the original thread. However, it can also be done with the players alone creating a massive wyrd-like fabric of storylines: Experiment!

Roleplaying can be done in many different ways. For instance, the environment and all non-player characters may be controlled by a singular assigned 'game-master', often the creator of the thread in the first place.
Another idea might be the players assigning other non-players as 'actors' for the non-player characters, adding a whole new plane of diversity for everyone's fun.
A third idea might be the thought that there are no non-player characters: Every NPC is in fact just an extension of another player, posted seperately from their other characters, which can lead to some fairly interesting, if massive, encounters!

Second off.
"Alright, let's start a naruto RP!"
Get the fuck out of here.