The only fair way to answer this question is to answer based on which scenario makes you feel worse. And for that reason, I absolutely (and subjectively) have to go with SP and BC.
Thinking back on the LP scenario, I'm disgusted. At the same time, however, I'm comforted by the fact that these types of situations happen all over college football on a yearly basis. Maybe not to the same extent, but players are always getting suspended for doing things detrimental to program image. But in the end, it never amounts to more than anything than a misguided player on an otherwise exceptional team.
With SP and BC though, you're talking about overall national perception and prowess. Very few people, outside of opponents who like to take cheap shots, talk about the LP situation anymore. Because as I said it just gets cropped up into the misguided player on an otherwise exceptional team category. Nebraska has been fighting to gain national respect since the Rose Bowl in 2002. We've all had to sit through broadcasters questioning just how good we really are, opponents no longer respecting us, little to any national coverage, and we also had to sit through a fan base that literally tried to tear itself apart.
A player and his actions hurts at the time, but passes after awhile. Football goes on. The feeling of what SP and BC did to the Husker program is going to sit with me for an extremely long time, however. It's not as simple to move on when your entire program is suffering, as compared to when one player is making you suffer.
Here's to Bo Pelini.