A few thoughts...
1). The general public isn't going to care as much about this guy's deception as Kip Litton's--there's not going to be a story in The New Yorker this time. Why? Rossi's deception is limited in scope. It involves one core incident, and his motivation is understandable, by which I mean it at least makes sense and isn't totally bizarre. Litton, on the other hand, was extreme. His ruse was so outlandish and intricate that it rose to the level of performance art.
2). Deny, deny, deny, like a politician. That's what Rossi will do if he's smart, because the story will go away--maybe not on LRC, but basically everywhere else. The absence of evidence (that he really ran the race) is not the evidence of absence! At least that's what he can claim, and it will be convincing to some and raise reasonable doubt for others. Unless someone has a picture of him clearly exiting/entering the race at location not near a restroom facility, he has plausible deniability, at least in the minds of many with whom the arguments about pace don't really resonate/make sense. I mean, a lot of people probably have some Hollywood-style ideas about running where heart and determination can propel you to achieve incredibly improbable things.
3). Someone a while back partially quoted my other post and claimed I didn't address the issue with the principal. In fact, I did. That was near the top of my post. I think the public shaming of the principal he did was much worse than the faked marathon. I imagine she had to deal with a lot of hate mail and outraged, maybe even threatening phone calls, not to mention the humiliation within her own community, just for doing her job. His stunt affected her personal and professional life far more adversely than some hypothetical runner who barely ran a BQ time missing out because of him. I'm not saying that wasn't wrong to or that he shouldn't be penalized through official channels, but, to be blunt, I think to be outraged about that--everyone online is "outraged" about this, that, and the other thing--is melodramatic.
4). In spite of my principled stand against online shaming, I have to admit that the LRC community's sleuthing is almost nonpareil. Now, I think combing through photos in the aftermath of the Boston Marathon bombing, for example, was a more valuable use of your research skills, but that's just one guy's opinion. And, I'll be honest--I'm conflicted myself, because I have to say that I find the narrative here really interesting, but it's not hard to find examples of how these things can easily go too far.