These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
What an Idiot: The first victim, who breaks the cardinal rule of diving: diving alone (or without telling anyone where he was going)to inspect a malfunctioning underwater gate. Even if there hadn't been a huge shark out there, some other disaster could have easily have happened with no one to rescue him—indeed, until his mangled corpse is found, there's considerable speculation from everyone—his wife, his friends, his employers, that he may have just run off on a bender.