Composites - built aircraft is not any more dangerous than any typical aluminium-built aircraft. Tendency to shatter? Deforming aluminium also presents a threat to crash survivors. Crushing aluminium parts have contributed to passengers' death before. Poisonous gases when burnt? Again, the standard in composites manufacturing for aerospace parts is that all parts are primed and painted with fire-retarding paint material after manufacture.....the same procedure that goes for aluminium/metallic parts i believe.
When will it be proven safe? Will it ever be? Is "proven safe" is a usable term in aviation at all? Proven dangerous, yes. but every certified flying aircraft is proven safe don't you think? until something happens....
my 2 cents...
