Must be why Ross felt the need to publicly chastise Schumacher on the radio, that or the FIA made Ross an offer he could not refuse, "tell Schumacher to smarten up or we will penalise him." What other motive could Ross have had for humiliating Schumacher that way with millions of fans listening?
The message was not primarily for Michael, it was to make sure no idiot steward got any funny ideas.
You will note that Ross told him to leave room into ASCARI, not where Hamilton was whining about him blocking at all. Ross was saying to the world and stewards that (as seen with Button) a sensible clean overtake in the right place would not be blocked in any way.
And in the end it wasnt.
Lewis' daft overlap into the right hander was not remotely on, he should have done what even Bruno Senna had the sense to do with Buemi and backed out of it and come back later.