If you did something and you know others are going to write your name you had better write what you did and why that was not acceptable. No one is identified as the tattletale so students are very open about the events. Deal with the offenders appropriately. From then on, hey know you will find out what happens when you are gone. Dear Anna, I have a student who doesn't do his work in class.
Recess is for two activities.
First, to use the bathrooms. Second, to have some play time. The playtime is a Privilege that is earned by doing the classroom assignments. Be very clear that recesses are earned. If work is done then the following recess is earned.