All they could do in the sort of cases we see usually is require a waiver.
I remember one here a year or so back where the Parents were doing Consular processing, they had come to visit but got jobs soon after, eventually gone home, 10 years had passed but were hit with misrep and had no qualifying relative.
Another common one is people who get Student visas and nver go to college at all, usually well I did not have the money is mentioned, seems a common one on Jim's show, it is like well what happened you showed the Consulate you did and then it gets very murky.
Has there been an increase in cases, and increase in questions an increase in denials, do not know, he is talking about a few egregious cases referred to him.