I am using a mechanism that tracks throughput (so that we can estimate tasks acurately for each individual on projects). Having this data could cause issues (i.e. with people motivated to make the numbers as best they can by rushing, or just plain lying about time spent).

Has anyone run into this? How would you deal with this information being readily available to the team and management? How would you prevent someone from using this data for improper purposes and or abusing the process in order to get their numbers up?