The absolute certainty that some people have about Litton having cheated, and the insistent denial by Litton supporters, are exactly analogous to the certainty with which I know that Bolt, A. Merritt, Jeter, Blake, and others have cheated, and the insistent denial by their supporters.
All these posts, here and elsewhere, about Litton...and on the global stage, to the world of "road running", Litton is nothing, a nobody. It really sticks in your craw, doesn't it?
One difference that people might raise is that not all runners are dirty in Litton's league, but that they all are cheating among the sprinting pros, so it doesn't matter if a sprint pro cheats.
Cheating is cheating. For every one of the sprint pros who cheats, somewhere down the line, a clean athlete is denied an opportunity. I don't care how far down the line you have to go to find that missed opportunity, but it exists, and is no different from the Litton effect.