That gave me a great suggestion! A server channel feature. A player could create a "server Channel" and pick which players are allowed to join the channel and see what servers are in it. If you host a server in your own server channel, only people that are allowed can join. Blocked people cannot. Allowed people can be upgraded to the rank of trustee which allows them to host in your server channel. There would be an additional tab in the server browser called channels where you can see all the channels you are allowed to join. This could be used for people that want to host DMs with only good battlers, servers for only their friends, servers for only mature people and so on.