Ratings systems suffer from an 'outlier syndrome', where most ratings are from folks at the ends of the bell-curve. Even averaging such data doesn't come close

Ratings systems suffer from an 'outlier syndrome', where most ratings are from folks at the ends of the bell-curve. Even averaging such data doesn't come close to any kind of true measure. One can imagine Police work would be subject to such effects even more strongly, as they deal often with people at their worst. It's the job after all.