I don't know why you say the rumour CANNOT be true, Kev. What is true is there has been no report made public from the inquiry conducted into the stable inspection the day before the Maryborough Cup and the scratching of two horses that had been treated inside the allowable timeline.
And the stable has form with pulling horses out of major races. Don't you recall the Ballarat Cup fiasco in December 2014, when the Stewart stable withdrew its 4 runners - Restrepo, Beauty Secret, Guaranteed and Philidelphia Man - after the stewards declared the sulkies to be used not in accordance with the HRA standard. David Aiken also pulled of his two runners.
While the reasoning reeked of HRV pig-headedness (a directive to all trainers announcing their intended racenight inspections would have prevented the debacle) it demonstrated a willingness of the Stewart stable to take on the authorities. They could easily have borrowed 4 compliant sulkies on racenight but, instead, scratched their runners from a Group One race. I have often wondered if all the connections of the scratched horses were 100% in agreement with the decision that left them out of pocket?
This was an early example of the stable dictating the terms to the stewards, so PP's report is clearly not a first when it comes to acts of defiance that would see other trainers rubbed out.