Shastri is BCCI's Dalal..... Though DRS is not 100% accurate but better than many umpire's decision. DRS uses is only when doubt about Upmire's decision...nothing wrong to review it with DRS. Recent series DRS controversy, again it is because of human mistake not system mistake. And as Australia is loosing..it need reasons to create controversy....so all aussies who till now favouring DRS are opposing it now....
If we had same attitude we will be eating raw meat and will be living in caves . In the DRS system may be 15-20 % decisions will be wrong with out that 100 % of the DRS will be going wrong way .