“guy phones in a bomb threat... is AT&T responsible? no
guy drives a ryder rental into a building and it blows up... ryder responsible? no”
Are airlines responsible for terrorists hijacking their airlines? no
Are cruise ships responsible for icebergs capsizing their ships? no
The family of the woman who tried to challenge a D-9 and was flattened instead, sued Caterpillar inc. The law suit went nowhere
“”Are cruise ships responsible for icebergs capsizing their ships? no””
yes, the ship-owner usually is. This is why ships have crews and insurance and stuff.
The ship itself is not liable I think, :p
A key purpose and duty of ships' crews is to avoid collision -- with anything. Your last point is totally bogus.