Okay, so quick run down for anyone unfamiliar with the flavor like me:
A Stand Arrow has dropped in Morioh...
This Arrow is apparently the tool the main antagonist, Kira, uses in this arc to awaken stand powers in normal people so that they protect him. Kira would rather deal with problems without getting directly involved and he uses bombs.
Apparently his bombs incinerate his targets completely and therefore that might mean we are going to have janitor kills here. Also, this arrow either strengthens stand users or gives stand to normal people with potential.
I assume only a limited number of roles or players can be converted - meaning roles that are players without a stand ability for their character. Also, Killer Queen Bites the Dust, is an ability of the antagonist to protect his identity whenever someone reveals it. Anyway, I assume it's these two reasons that claiming is punished in this game.
Other than this, I'm just tired of reading the wiki, but we may indeed be dealing with a cultafia here for now.