If they want to help look for someone's ball, they can. The gallery can assist players in certain situations as long as the player doesn't unduly delay play. At a PGA TOUR event last year, I saw a player standing in a bunker take a practice swing without a club, then go over to his ball with a club and play a shot. Under the rules, he can firmly take his stance. In that situation, you would have to ask the player if he was testing the condition of the hazard.
Players do go in on occasion to look at the shot and determine the club they want to use.
He can call for a second opinion. He has that right. As far as a ruling being changed, if one of our officials thought we were making a mistake, we would jump in. The key there is to make sure we're right. I don't feel like there are any rules that, big-time, need to be changed.