Think back to the Helicopter full of friendlies that our A.F. shot down over Iraq about 8 years ago.
Many problems. Wrong IFF code entered by ground crew, no visual check of target as per ROE, no notification of flight plan of helo to A.F. controllers, and another that is slipping my mind right now.
Remove any one of those and no friendly fire disaster.
I suspect if this is not sabatoge then what happened was a series of events and circumstances that are not likely to happen again even without a change in any policy.
But you can bet some manufacuring processes are going to be reexamined.
Of course most were with China Airlines (ten times the average for incidents) and could have been pilot error: one case in Japan, one in Taipei. Any comments?