Have people been victimized who used RTI and exposed corruption?

Yes, there have been some instances where people were physically harmed when they sought information which exposed large scale corruption. But this does not mean that ever applicant faces such a threat. Filing application to seek status of your grievance or for knowing other similar routine matters does not invite any retaliation. It is only when information is likely to expose bureaucratic-contractor nexus or any kind of mafia that there could be a possibility of retaliation.