This is probably not what you are looking for, but if everyone is going to be playing at the same time and they are on java, you can use a mod like World host or e4mc

Also, if someone is using pirated minecraft, you have to set to false online_mode in the server.proprities file on the server(this will also remove skins, but that can be fixed using a plugin/mod if you are using custom software for the server; and will allow anyone to log into anyone elses account, which can be exploited if a player has operator permissions)

When you open the app without an account, the animation it shows still says that it doesnt have any ads

It being proprietary isnt in the top 5 of the list of my problems with AI

HolyOS, Hannah Montana linux, AmongOS