I have yet to see a lawsuit, and it is not harrassment, as you are running the report for all rep's, and it is based on employee productivity. Trust me I have worked in CCard call centers, and most agents are by far some of the laziest people if they can get away with it.
Now throw out a daily, weekly, and monthly queue report, and you'd be amazed at the turn around in productivity. Then add a reader board or two that flashes real time stats, now thats a party. Not to mention HR loves it, as this is "documented" proof, something HR rarely ever gets.
Standards are pretty straight forward, 8 hour day, minus 1 hour for lunch, and 2 15 minute breaks, that equals to 6 1/2 hours of actual work hours. With the reports it is very, very simple to weed out the bad seeds. 10 reps 5 hours 45 minutes on the phone, 5 reps with less than an hour.