Before somebody asks.... If you don't like the alerts that the system sends you can always delete the cron job, it is called "Moderator Management alerts" and you can delete it at the:
Scheduled tasks -> Scheduled tasks manager -> find "Moderator Management alerts" and delete it.
You can also run the task to see an example of how you'd see the alerts. I find the alerts a main feature of the system but you can get a lot of alerts if you have many moderators and they are all inactive