I don't know all the alegations of Sapp and Shockey, etc but in general:
As Business Law teaches us, The truth is always a vaiable defense. So if something was being done wrong and it was reported, regardless of motive, then it is just and proper. Actually, a case could be made that the person who brought it forth is more honarable than the guys that knew and kept silent because you can talk about "codes" as much as you want, all those things pale in comparison to what is legal, moral, and ethical.
And that is just what this is: Sometimes we miss things when people make extreme examples to make their point but the reality is there is no defense for supporting a stance that literally can end a person's career, negatively impact their quality of life, or end their life.
If there is a "code" to follow in the NFL, it not the "keep quiet when guys are trying to make a thousand dollars by getting the John Deere Tracker/stretcher on the field at another guy's expense". The code to follow is to be professional, be a good teammate (which doesn't mean cover up stuff), and be respectful to the game, yourself, and others. We have seen many many times, hard fought, nasty hitting games WITHIN THE RULES that, when over, the competitors embrace each other, tell one another "good luck" in following weeks, etc. When a player is significantly injured on a field, you commonly see players form both sides comforting the person, praying for them, etc. You hear players talking all the time that there is a "brotherhood" in the NFL. We all know that, yes we fight with our brothers and sisters, but there IS a line that you don't cross with your brothers; your family. The REAL code in the NFL is understanding just how precarious their entire livelihood is and understanding their responsibility.
The real sad fact in all this, if its true about Shockey, is that he will be villanized by some when he should be lauded. But unfortunately some people don't understand that he may have just inderectly saved someone's life; maybe theirs. And the person who reports the wrongdoing should always be protected and remain anonymous because if soemthing happens or he catches backlash, then it doesn't encourage the next guy to do what's right the next tiem something comes up. And its hard to do the right thing; even harder when it appears you will be punished for doing it.
And Sapp, (again if this is all true), well he is a media guy and in some sense you could say he was "reporting". Question the methods, etc, but at the end of the day, if its factual, then it was reported. All that does is seal his own fate as a media person because people won't talk to him in confidence as freely. So be it.