Garland:
I think my reference was to that bunker on the 18th at Pebble Beach, and just that there was a good reason for it ... that turf in that area would probably die because of salt spray.
In general, though, I do NOT believe that all "double hazards" are bad. I'll agree with Mark Fine on that one. I think that on occasion it's okay to have to hit a bunker shot under a tree, say ... in fact, I had a shot like that somewhere in the last month, I believe at Crystal Downs. There is no rule that says you HAVE to be able to hit it toward the flag ... and if you're playing to the side you will likely eliminate the "double hazard".
"Double hazard" is just one of those rules of thumb that gets misused into a Law of Golf Architecture by guys who don't want to argue the individual case on the merits.
Bart:
I'd bet Jack Nicklaus' book has something about double hazards being bad. I don't have his book, but at Sebonack he didn't want us to leave a flash of sand up on the right of #16 fairway because you might have to play out of it and under a tree. I said I would rather play the shot out of a clean sandy lie than out of scrubby rough, because the trees were still going to be in the way; but he said "double hazard" and two or three of the guys we were walking with agreed as if that were the end of discussion.