It's like the trolley problem - blame it on whoever starts the coaster instead of the guy who set it up in the first place.

[somehow, we still come back to the trolley problem]

I don't...know what we'd do if anything accidental ever happened. I know what he'd want us to do, of course. I don't expect any mercy from him. But we've had so much trouble already... [And everyone, even Hodaka at the end of the day, killed intentionally. What would a trial over an accident look like?]