I have been all over East Tennessee. I'm not going o say there aren't any. But I have never personally ever observed that I can remember, any signs as you have described around here AR, whether it be those (and I agree tacky) lighted signs with moveable letters nor especially any tablaeus whatsoever of those which you describe.
Although a very conservative part of the country and yes, smack dab in the middle of the Bible Belt, such trash would never be tolerated in this county and I think I'm safe in saying, most other East Tennessee counties. Yeah, we have our redneck "trash" just as Washington and New York have their "trash." But they're certainly not even a significant minority and the only people they impress are themselves.