Both presenters explicitly acknowledged that a number of anonymous remailers in the US are run by government agencies scanning traffic. Marlow said that the government runs at least a dozen remailers and that the most popular remailers in France and Germany are run by the respective government agencies in these countries. They said that they themselves use 1024-bit keys. So I thought I pass that on. Beware of anonymity-bearing gifts.
Causes can extend even to minor, non-disasters.
I think the risk is more general than just disaster situations. Because the water isn't stored symmetrically, it has pushed the earth's axis about 60 centimeters from the North Pole toward western Canada. The RISK certainly seems big. According to the author, reservoirs are the only human activity big enough to cause an appreciable change in these global phenomena. Like an ice skater pulling in their arms, we could get rid of those leap seconds from the earth slowing down if moved enough water away from the equator.