I already got a response from rD:
We pride ourselves on the quality of our races and want every mile to be absolutely magical. I’m truly sorry to hear of the disappointment with course changes during Walt Disney World Marathon Weekend and appreciate you taking some time to share your thoughts. I’ll be sure to share your comments with runDisney Leaders, as we are always looking for ways to make our race experiences better.
We sure hope to see you at another finish line real soon.
Kind Regards,
I think they must've known we'd riot and had some staff on hand to deal with us.