This can and should take many forms: wardens, apparel, certain sculptures, executions, etc. Makes sense with Wardens, but I was kinda bummed about the other two. Either do it right or recruit the pawn as a free colonist instead. This means that if you have a slave working on the same schedule as a regular pawn, you’re not doing it right. Do not attempt this with an Ideology that sees slavery as anything less than Acceptable. Playing the dedicated slaver requires a lot of forethought and the right setup from the get-go.
Other Techniques for Rebellion Mitigation The Cons of Slavery.Setting up a Slavery-friendly Ideoligion.