sry, this yellow aiming through wall is nothing... You even can see at his movement, when Shadow does railjump in yellow, that he saw him when he came in, not before through wall.
I didn't see what u saw before, but this demo is nothing. And when u say this yellow aiming is suspicious I don't trust your feelings about the things before.
For my taste we blame too many people for cheating withour any proove recently...