53 here and I heard and used it a lot as a way to call people crazy, nuts, etc. Used it in front of African American people, none of whom ever told me it offended them. The saying's origins may have been racial, but their conotation nowadays simply is not.
But this particular phrase doesn't have any racial origins. A different phrase with the term cotton-picking did, but that doesn't make this phrase also racist.
I mean, I would love for someone to actually try to explain how the phrase, "wait just a cotton-picking minute" could actually be racist.
It's not a term I can recall really ever using myself, but I've heard it used plenty by people older than I.
As for the topic of the thread, and the OKC announcer being suspended, I mean there's not much I can do about it, unfortunately. The people in our society that feel aggrieved by every little thing (even when there is no legitimate reason to be offended) are just much louder, more obnoxious, and more persistent than the reasonable minded people of our society that see through this outlandish behavior. I'm just not sure how to fight back against these people that should be pushed out of our society when so many people just seem to be indifferent to it all.