When most people are in the position that their world views and their comfortable habits would be inconveniently changed by the revelation that a rhinoceros has infiltrated their town, then a rhinoceros can walk down Main Street in nothing more than a fake mustache and a funny hat and no one will notice it.
The problem is not that the rhinoceroses have become dangerously skillful at disguise.
Scratchings 
What with all the rhinos not even bothering with the funny hat anymore, I would say that there’s a lot of river-in-Egypt going on.