Would have kicked right off if someone did that in one of our matches
Law 23. (b) The ball shall be considered to be dead when it is clear to the bowler’s end umpire that the fielding side and both batsmen at the wicket have ceased to regard it as in play.
Presumably they had time to see the replays and realise it was unsporting to appeal.
Don't any of you be under the impression that this is a 'great sporting gesture by Dhoni, it was a ***** trick to do it in the first place.
Well within the letter of the law mind you and dumb cricket from bell!