Has anybody made a Google Earth presentation to
show dangerous locations around the world where
we may encounter unpredictable or unavoidable
storms, rogue waves, pirates, sea mines, etc. ?

I don't know enough to do this myself but here are
some of the dangerous locations along the world's
major sailing routes which I've read about :

Bay of Biscay
Offshore in the Pacific Northwest
Between Panama and Aruba
Gulf of Tehuantepec
Gulf of Papagayo
Red Sea
Tasman Sea
East coast of South Africa
Between the South Pacific and New Zealand