I just love all these "Garratts as master spies" posts.

A lily white couple immersed in a sea of Asians, is hardly deep cover. Taking photos of traffic you say - oh-my-gawd. With foreign diplomats coming and going, openly, from their coffee shop. OMG again!

The US, and others, have spy satellites that could take photos of individual pages of the Bibles that the Garratts thumped daily.

The US, and others have paid spies in every corner of the globe where they feel ,for whatever reason, they need information. 

The Garratts are oddballs, no doubt. Marching to a different drummer, and I suspect with more than a little bit of "Christian martyr-complex" motivation.

But spies? Too funny.