Many players are not happy with the toxicity of the official servers in Atlas. That is why many survival enthusiasts are creating their own private servers, which allow them to run things the way that they like it.
Unfortunately, the game doesn't regulate the permissions of who can or cannot enter these unofficial servers, so it can get a bit messy for server admins. The solution to this comes in the form of the Atlas Join Control mod, which allows admins to grant or block a player's ability to enter their server.
If you are well versed in the JSON data formatting, then this mod may become your best friend when it comes to administrating a private server in Atlas.