It doesnt matter what the actual decision was about. Speaking as a matter of principal, till DRS has flaws, BCCI is entitled to keep refusing to use it. Also they did try to selectively use DRS on a tour earlier, where, DRS for LBW could not be used, but DRS could be used to adjudicate on edges and bat pad types.
Trust me, that tour threw up a bunch of shocking decisions, including one where an Indian batsman, was ruled n.o. for caught behind. Eng reviewed it, and despite nothing showing up on Hot Spot the decision was overturned. Dravid was on the end of a few shocking overturns that tour.
BCCI was then the first to question Hot Spot technology. Their stand was vidicated during the previous two Ashes which were a never ending series of DRS fiascos. Hot Spot after that tour was kicked out and and is now used only along with RTS. Even the creaters of Hot Spot had admitted that Hot Spot was not 100% accurate.