I don't want to open old discussions, especially with everything that happened with Michele, (which brought home just how much these guys risk every time they go out on track), but Marc certainly isn't devoid of Charisma, I've seen him on plenty of shows where he was the life and soul, even when not speaking in his mother tongue.
I don't consider him deliberately dirty, but he has made mistakes through over enthusiasm that have cost other riders points.
Him being booed is the same reason Casey got booed, because of Vale.
And on the subject of Vale, if you ever want a pristine example of deliberate dirty riding, then look no further than Sepang 15.
Sorry for going off topic, this should be about Mugello, so I'm happy to discuss in another, more appropriate, thread.
Edited to add apologies for repeating what Michael said, he beat me to the draw and, as always, was infinitely better at it than me.