CVille hits on the key point here. There are a number of programs in the country where this or even worse would never have gotten out. The transgressions of the kNU football players, the OU football players, etc., etc. were well known in those communities and states yet never addressed publicly because of the influence of the schools and of those in the community who supported the programs.
If Nebraska had a consistent top 10-20 basketball program under a coach do you think this tape gets out on that coach, not if the reporter wants to keep his job in Nebraska. How about the same thing in certain schools in Texas or the SEC where the university is king.
Don't get me wrong, Mike Rice should have been fired for what he did and any other coach doing the same things in the same context should be fired as well. All I am saying is that the fact that Mike Rice was likely on a path to being fired for lack of wins in the next year or two made it much easier. I can see a lot of coaches who could safely do the same thing and not have to worry about their jobs because they win.
Knight did get fired but it wasn't as much for what he did as it was for not living up to the standards that he himself had set for the success of the program. They started having some "bad" seasons by earlier standards and that in combination with Knight rubbing some money people the wrong way led to his firing. Had he hung up another NC banner in the last 2-3 years he would have had the job for another 10 if he wanted it.
Pernetti will have another chance to work his way back up the ladder although it will be a little more slippery this time. He will either go to an AD job in a lower level school or an assistants job at a major school. In a few years he will be able to say that he had made a mistake, didn't have all the information, and acted on the wishes of his superiors and will be forgiven to an extent.
In time he should get another shot at a mid-major program. Do well there and in time he could be back in a major conference. We live in a pretty forgiving society, especially if a guy ask for forgiveness and can put some distance between himself and the actual offenses that occured. This is especially true if the guy can bring you some wins. Great example of this is Eustacy at CSU. If he were 10 years younger and happened to get CSU into the sweet 16 how many schools would be more than willing to forget his past and hire him.