Let's step back a bit and review some facts.
To my knowledge nobody in any position of authority, and certainly no government official, has seriously suggested banning anything. The South Carolina state legislature has put the question of the flag outside its statehouse on its agenda, and it looks like the measure to remove the flag probably will pass. (Among those favoring removal of that flag is Republican State Sen. Paul Reynolds Thurmond, son of U.S. Sen. Strom Thurmond.) The issue under discussion is not whether the Confederate flag(s) should be banned in some way, but whether it's appropriate for such a flag to fly next to a government building where a legislature that represents all the people of the state holds its meetings.
The leap from a proposal in the SC Legislature, regarding one flag on one pole, to movies, TV shows, re-enactments, books, and even plastic kits is a mighty big leap.
TV Land (which, drat it, our cable company doesn't carry) decided for its own reasons to quit showing "The Dukes of Hazard." I'm not party to TV Land's executive decisions, but I've seen no evidence that any government entity had anything to do with that one.
My strong suspicion (supported by this thread) is that the disappearance of "General Lee" kits from hobby shop shelves is due simply to the sudden popularity of the kit. The 1/16 kit is currently sold by Round 2 Models. I don't know much about Round 2, but on the basis of its website I have the impression that it orders limited runs of old kits and sells them, through a single wholesaler, till they're gone. (Three of my favorites, the old Inpact Flycatcher, Fury, and Bulldog, have vanished from the website.)
I took a look on the Round 2 site at the photos of the "General Lee" kit. Only one of those photos shows the model's roof. There's no flag on it. (What's on the decal sheet I have no idea.)
One of Round 2's latest announcements is that it's bringing back the MPC 1/25 kit of the "General," the Civil War locomotive - operated by a Confederate railroad - that was taken by Union forces for part of one day in the "Great Locomotive Chase." I may buy that one - mainly because I find steam engines fascinating and there are so few locomotive kits that aren't intended for operation on a layout.
I haven't read anything in any serious news source about any suggestion by any governmental agency at any level to "ban" any movie, book, model, TV show, or anything else. If companies like Wal-Mart, K-Mart, etc. have decided to quit selling particular pieces of merchandise, they do so not because somebody has ordered them to but for the same reason they do virtually everything else: because it makes sense in terms of money. That's not political correctness; that's capitalism.
The other day I went down to Kinston, NC and visited the C.S.S. Neuse Civil War Interpretive Center - a first-rate new museum that's operated by the State of NC. Several Confederate flags were to be seen in the building. The people who work there tell me that nobody has even remotely suggested that anything should be done about those flags. The same is true of Bentonville Battlefield, the other Civil War site near here.
I've been teaching college students about the Civil War/War Between the States for forty years, on both sides of the Mason/Dixon Line. I find the rapid change in public viewpoints on the subject extremely interesting from the historical standpoint, but it's way too early to analyze just why that change has happened at this particular time.
The 1861-1865 Unpleasantness was one of the key events in the history of the United States. It certainly deserves to be remembered and studied in depth. (And it has been. Books about the Civil War have been coming out at an average rate of about one per day since 1865 - with no letup in sight.) But on the basis of what I see in the classroom (and on essay exams), I think I can state with some confidence that the war is not a topic of particular interest to the vast majority of Americans. (Those students, let it be noted, are not a representative cross-section of American society. They've all graduated from high school, and their SAT/ACT scores are high enough to get them into college. And at the beginning of a freshman-level survey course in U.S. history, about 90 percent of them can't tell me the year in which the Civil War ended.) To most Americans, no movement to forget about the Civil War is necessary. It's already happened.
I think that's a deplorable, frightening situation. But surely the solution to the problem is to consider the facts objectively (I do think that can be done), rather than by spreading stories that are either hyperbole or outright urban legends.