In World War II, there was a counter intelligence operation thrown at the Axis powers that involved the most absurd stunt pulled by a legitimate power since the historical use of the Trojan Horse. A lot of people reading it might think the move was insane. But it should be noted that the operation was a complete success.
Thus 'Operation Mincemeat' went down in history.
Back in the world of the story, the SI suspects that Hino knows a little more than he lets on about. But how much Hino really knows may just blow your mind. A constant reminder to the SI that even most idiotic seeming people can be rather smart when left to their own devices.
Perhaps these lessons could be applied liberally.