After having lived in a corrupt country, this will just get you killed. These people aren't lone actors, they are part of a network of people looking out for one another. If these sorts of crimes aren't investigated seriously by the authorities, then they are in fact part of that network and you are really going after the main power structure in the society. You will need to affect some sort of revolution to displace that power structure, anything else will just get you locked up/beat up/killed/or worse.