A few years ago, a colleague advanced a theory on how to operate in the travel-sphere: be a Giver. There are Givers, she said, and there are Hoarders. The former, inclined to see intelligence-sharing as an act of munificence rather than one of self-sabotage, are generally helpful when a colleague, reader or follower wants a recommendation or opinion. The latter don’t share much of anything. No coordinates, no contacts. When they travel they post only the most oblique hints –…

