Dan -
although like Terry I'd be happy to find a decent-sized ashtray on the club-house patio, I think small bunkers serve an important function. Besides the strategic and shot-testing aspects, I think they're important in "selling the look" of a golf course. If I arrive at a golf course knowing that there isn't any sand around for 100 miles, I'll still "accept" the fairway and greenside bunkers as part of the look, especially if they're done well. But that artifice would be more convincing with tiny little bunkers here and there, because it's easier to believe that IF these great big swatches of sand DID occur naturally, there'd also be these little pits of sand lying around too.
Not the most important thing in the world, I know, but it helps things look nice, which is nice....
Peter