Tommy,
No self respecting Southron would ever put anything in their grits! Grits are perfect, why mess with 'em? Maybe peanuts in their Coca-Cola, but...
Mike,
I was looking at a bunch of old pictures and FWIW here is what I think looks unatural: bright white sand, smooth bunkers edges, manicured and edged so much that the lip of the bunker is 1-2 inches high (almost a mini sod wall!) The shape I object to is the softly rounded, smooth look that seems to be more concerned with accomodating a sand pro than anything else. The "Mickey Mouse" eared bunkers of the 70's and 80's are just gross.
While I, too, am not sure that the angular edges that are almost geometric look great, I do really like an "unkempt", rough look to bunkers. It looks more natural to me to have edges that have some smmoth parts and some collapsed or jagged edges as well. To me the more you look at lines in nature the more you see all kinds of little imperfections, humps, bumps and swales.
Of course creating it is "unnatural" in the sense one is artificially trying to re-create that look and it can be overdone but...I would argue that what doesn't look good to you may be the examples of an "over the top" attempt to create the irregularility naturally occurring in nature.
One of the better bunkers on my course came after a big rain last summer after we had just moved a lot of dirt. The water naturally created some cool washed out shapes--gulleys really that became the frazzled looking bunkers (nine of them) built into the side of the hill on our ninth hole. That washed out look also became part of a 6000 square foot bunker behind my eleventh green (the green is right at 4000 sq. ft.)!
I think nothing could look more natural than just expanding on what nature had started and trying to re-create the funky lines those rains produced.