I don't want to get in this drama but this has to stop!
Saying "You know what you did!" and then warning them is not what the staff team is there for, tell them what they did wrong and what they are allowed and what they are not allowed to do! Then decide what a proper punishment is.

I don't want to get in this drama but this has to stop! Saying "You know what you did!" and then warning them is not what the staff team is there for, tell them what they did wrong and what they are allowed and what they are not allowed to do! Then decide what a proper punishment is.