According to your response below:
Your cant penalise people for riding on the kerb
Your Cant not penalise people for riding on the kerb.
There is no rule defining the extents of a racetrack.
In that case i could straightline any chicane (corkskrew included) with no fear of retribution, after all if there is no definition as to the extent of the track, how could i have possibly be said to have left it?!
The white line around the edges of a motor racing circuit which are continuous (excepting for the entry and exit of the pits) traditionally deliniate the edge of a racing circuit. These lines are visible on the inside of corners usually abutting the kerb. Hence in F1 if a cars outside wheels are completely on the inner kerb they will often recieve a penalty if it is deemed that they have been advantaged by their positioning.Equally on the exit of a kerb they will tend to be penalised if their inner wheels are wholy across the white line.
I appreciate that you will not believe me, as i am not quoting chapter and vers from the FIM (FIA) guidelines, whilst i would love to down load them in full and find the regulation i really cant be bothered. However if you believe there is no definition as to what the extent of a racing track is then Rossis moves both in 2013 and 2008 will be fine in your estimation, after all he was ahead and never left the track (as there is no definition of what the extent of the track is) In that case casey stoner would have been completely to blame if there had been contact for running in to the back of another rider who was perfectly within his rights to have taken the line he took, as he would not have left the defined track, due to there being no such thing as a defined edge of the track.
Taking it one stage further if there is no defined edge of the track then is there a track at all, maybe the start finish straight goes both ways, after all there would be no way of defining what the edge of the track is, so therefore i could ride round in circles crossing the start finish line 28 times and have won the race.
Of course i am being faceatious, we all know what the edge of the track is, it is the white line around the edge of the track, but i thought i would take your argument towards its extremes.