It promised to set an example for an uncorrupted party whose members are not suspected of involvement in criminal activity or financial irregularities.
A fast revisit rate becomes critical to providing an uncorrupted track when a target moves in dense traffic or is temporarily obscured, if only by trees along a road.
A malicious user pollutes the file by converting it into another format that is indistinguishable from uncorrupted files (e.g. it may have similar or same metadata).