My opinion (the only one that matters to me...)
The difference between legitimate hard riding, inc block passing etc, and the BS move that VR46 pulled is:
If stupid lines and slowing when you should be accelerating are allowed, not only does the sport turn from racing to roller derby, but close racing would be dangerous and rare.
To get the racing we enjoy (eg Phillip Island this year) the following rider has to turn in, and open the throttle based on the racing line. If the following rider can't trust the rider in front of him, and has to leave the throttle closed till he sees the rider in front open his, he would be severely disadvantaged. Doubly so if he has to worry the rider in front might slow for no reason (except to cause huge "issues" for the following rider)
Ironically, my take on the last week is:
Rossi blatantly and deliberately did to MM93, what he claims MM93 has been doing to him, so subtly that it can only be seen using hindsight and yellow lenses.