What are these strategies?

Please go ahead and file RTI application for any issue in the first instance. Normally, anyone would not attack you immediately. They would first try to cajole you or win you over. So, the moment you file any inconvenient application, someone would approach you very politely to request you to withdraw that application. You should gauge the seriousness or the potential of the person approaching you. If you consider it to be serious enough, ask 15 of your friends to immediately apply to the same public authority asking for same information. It would be better if these 15 friends were from different part of India. Now, it would be most difficult for anyone to target all of your 15 friends all across the country. And if they threaten anyone from amongst the 15, let more people file similar applications. Your friends from other parts of India can file their applications by post. Try and give it wide media publicity. This will ensure that you will get the requisite information, and you would have sufficiently minimized risks.