We could think about this a lot of different ways here. We could, technically, put every single person in some kind of category and figure out a reason why that category might be targeted. Like if we're going by the "take out the intelligent people," one, then you could potentially be next.

[ hiro asks a lot of questions? which could potentially be dangerous to someone who's trying to kill them off. ]

We're also assuming that whoever the people who are guaranteed to kill someone each week, like the Chiefs say, are actually working closely together. Or how that even works in general? We know that the Chiefs have some way of enforcing the rule, but we don't really know how it works.