Gloves-off fighting is a really silly idea at Monaco - unless the front-runner starts to have terrible tyres and is a sitting duck. Ross needs to be very clear - no doubt he already has! Not saying Rosberg should be given anything, but if the places were transposed i would not expect Nico to be aggressive either.
If Rosberg does lead Hamilton from the start, it will be interesting to see whether he does go on the attack, or whether he goes the more logical route of trying to gain the advantage through pitstops. I suspect he can see the bigger picture better now than in the infamous 2007 race.