I knew that water slide would kill someone.

[Aroura]

The news interviewed another guest who said the harness in front was not working correctly.  She said she rode it more than once that day, and it was not working any of the times she rode it.  
Does not say if she bothered to tell an employee about that, or if that is the cause of the death.

Just a really horrible tragedy though.

So your on a ride and notice that the safety feature is not working so you do it again and again.

I know, RIGHT?  That was my first thought.

If a harness is lose or not working on any ride, I would tell the operators of that ride right away, and then stick around to make sure they fixed it or stopped using that seat, at least.  Seriously.