I think putting from bunkers is a scam. I can see the hopeless or desperate guy give it a go. But honestly, what is the point of maintaining sand flat and enough to make putter a viable choice? In Arble is King of the Golf World the archie should never build enough bunkers where he can afford to "waste" some on this folly. Just leave it a hollow. It will look and pay better. Or, put a hump in - it will look and play better. What is the obsession with sand being the be all and end all? In my world, bunkers should be harsh, used judiciously, wisely placed and in balance with other features/hazards. I said it before, but I would love archies to defend each and every bunker. When they approach the same reason for a bunker five times - then rethink the hazard. An approach like this, in the right hands, would I think make for better and more varied courses.
Ciao