The point isn't really whether the decisions were correct. It's more about the way people insist that the team should have "done the right thing", "spirit of cricket" etc. Such as the "obstructing" one in England last year.Absoloutely nothing wrong with either 3 of these situations, first 2 the ball wasn't dead, the ball isn't dead until it has usually been in the keeper or fielders hands and held for a period of time and thrown to another fielder. The second one it wasn't shown if the umpire had signaled 4, if he hadn't the batsmen shouldn't assume it's 4 and therefore until the ball has been thrown back it is not dead. The last one is tough but the bowler was within his rights to go for the ball and then the fielding side take the bails off, just like If the ball hits the stumps or umpire or batsman and is caught it can be claimed as a catch. Grant Elliot learn to bat on a decent sized ground and you might not be so grumpy mate
Bottom line is, it's out under the laws if your team gets the wicket, it's against the spirit of the game if the opposition does.