There is a science to what Draymond does, similar to what Rodman did about 30 years ago.
Notice that once the game became about Draymond's antics (and yes, he should have been tossed several times over) and the Celtics started responding to him and the game became all about him, that Curry and Poole got going? He takes all of the pressure off the other players knowing that he can do anything he wants because the refs are scared of him. Rodman did the same thing - limited athletically but a master in baiting the other team and turning the refs into eunuchs via intimidation. Further, Green knows that in the playoffs refs aren't going to do shit. Draymond did the same thing vs Memphis, getting kicked out in game 1 which bought him the rest of the series to be the dickhead we all know him to be.
Boston's challenge this series is similar to the Bulls' challenge back in the day - stay focused on the game and don't let the other teams' dirty play get to you. and it will be on the Celtics to manage it because the refs might as well be cheering for GS.