Paul,
I am sort of an amateur history buff, and an amateur archeological buff, so I do admittedly come with a negative preconception.
But yes, I have played the one at Barefoot Landing.
It looks pretty authentic, but perhaps it's just my knowing that it isn't is what I can't get past. I'm reminded of being in Caesar's in Vegas, and walking into that section that is supposed to give you the feeling of being in ancient Rome. Or, at Epcot where you walk from one country to the next 500 yards down the path.
Knowing it's not authentic is much different than knowing it is. I recognize most probably don't care one way or another, but I do.
I've played courses that wind past Civil War relics, stone walls, fences, etc., and they are super cool because they are exactly where these men fought and died and you feel part of living history.
It's hard to tell exactly what the purpose of a faux ruin is, except as part of creating an artificial mood that simulates some past reality.