At a previous job I was not allowed to do disaster planning with customers, after I told one of them that it was entirely possible to take out both our datacenters with one plane crash. The two locations where a "safe" distance apart, but where also located fairly close the approach of an airport, and a crashing passenger jet is big enough to take out both buildings.

Apparently I plan for the rather rare catastrophes, and not those customers care about day to day.