How did it work? Is there evidence one voter switched votes because of it? No committed voter would switched based on the word of another campaign. On the other hand, in a caucus situation, supporters of candidates with low totals often migrate to top tier candidates. Like what happened with O’Malley voters.
Won't have any effect in the long run.
I can't imagine it will happen again this election cycle, everybody will be looking now for fake tweets, etc.