The very WORST thing I feel we could do here is rush to the clamour of 'Something MUST be done about this!!!'
Frankly, the best thing to do here is NOTHING - aside from enforcing a '2 persons present' rule already adhered to in many jurisdictions.
If we rush to implement 'something', it is likely we will be dealing with unintended consequences somewhere down the line - and we will have solved nothing.
Remember, we are (if confirmed) dealing with what is probably the rarest cause of all accidents - only SIX cases have been recorded in the whole history of commercial aviation, and not all were positively confirmed.