It always comes down to simple human stupidity error, doesn't it?
I'm shocked, but not surprised. The alarms had been inhibited so that the crew could get a good night's sleep. OK, well and good. Personally, if I were quartered in a huge body of water on a rig that dealt with oil and all the industrial chemicals, and knowing what they could do, the alarms would have been the last thing keeping me awake.
I just can't get my brain around this sort of behavior, just as I couldn't get my brains around the BBC report a few weeks ago that the ball bouncing up the chain of command had been dropped. I don't have the citation handy, but recapping to my best recollection, a worker saw an alarm go off. He told his supervisor, who told his supervisor, and then that was that. For some unfathomable reason, no action was taken.
As a result of two relatively small inactions, eleven families lost loves ones, and many more are losing their livelihoods, and even more are losing the beaches where their memories live. You can't put a dollar figure on this, but I hope that the courts come close.