I just love it how you can get them to scurry on here and type silliness. They're so cute that way. You can get the to talk about all kinds of random things. Flowers and children's books and Good Night Moon.
As the person who made the allusion to Harry Potter, I stand by using it as pretty cogent example of how hiring your own can become a normalized practice that has more heuristic than saying "Well, I'm witness to seeing it happen in my department and I don't reccommend the results, because it really limits the overall experience and academic perspective of the department."
But it does sure help curtail the troublesome problem of "fit". (re-read with intended sarcasm)