I would rather him on the Habs than the Habs have to play against him, especially in a playoff series.
He's not that much of a factor that your going to be effected by him in a 7 game series. If he pulled a bone head move on the habs top players one of either Kostopolous, Cube, O'Bryne or Komisarek would put him in his place.
Everyone loves a Tucker/Avery type on their team, but a player like Downie is a cheap shot artist looking to injury, not to aggrevate and get under your skin like real pests.
He is going to pull something worse than Chris Simon has, watch and see...it is going to happen sooner than later, he has a screw loose and something bad is going to happen to someone because the NHL hasn't put a leash on this idiot yet.