I can't help but feel that there are some underlying issues out there, that'd led to this whole sledging ruckus to cause such animosity between Australia and India. I mean sure there is no denying that Harbhajhan is an absolute tool, no rational Indian or Australian supporter would disagree with that, but there really wasn't any need for Hayden to call him out publicly. Particularly in times of strained relations between the two sides.
I still feel there's very much a grey area in what can be termed as acceptable when it comes to sledging. Basically in Indian domestic cricket sledging isn't anywhere near as prevalent as there is in Australian domestic cricket and when these Indian players get into the national teams and are being constantly put off their game by jibes and barbs from the Australian players it can be unsettling and belittling. Now what may be termed as 'gamesmanship' by Australian players is simply termed 'verbal abuse' to Indian players and that's why they 'whinge and complain' to the umpires because they feel that this so called mental intimidation and shouldn't be part of the game.
But from an Australian POV, mental intimidation always has been a part of the game and their mindset is that this 'gamesmanship' is perfectly acceptable as they have been doing it throughout schools cricket, state cricket without any apparent qualms and this has spilled over to the international stage.
In India's previous tours to Australia, the Indian players have generally been mild mannered and ignoring any onfield slurs (i.e Dravid, Laxman, Kumble & Tendulkar) and letting their cricket skills do the talking. But now the younger brigade (Harbhajan, Sreesanth, D Kartik) feel that they shouldn't have to be constantly belittled and put down and feel the need to retaliate. The problem is they haven't learnt to sledge back appropriately and their comebacks seem to the Australians as a bit over the top and downright stupid. This is why I'm glad that Dhoni wants his team to learn appropriate sledging as it's an important mental attribute to have when facing the Australians.
I think a ban to sledging is a bit of an overreaction and is such an ingrained part of the Australians physche (sp?) that it would be too hard to cut and police the verbal noise to zero. Only cricket ability related sledges should be accepted with no abhorrent language. Maybe (I know this may seem a bit drastic) if you make all the onfield players wear little microphones they will be a lot more select with their words. But you'd have to filter it in such a way that whatever they say will go straight to the match referee's room and not affect the television broadcast. Atleast this will eliminate all this 'he said, she said' crap.
Atleast, this way the match ref would have some serious evidence for guilty offenders and an appropriate ban (without appeal) can be meted out.