If you want to build an insular community for your nerd friends, put up a MUD server. You can build silly text toys, write tiny pieces of code for stupid fun,

If you want to build an insular community for your nerd friends, put up a MUD server. You can build silly text toys, write tiny pieces of code for stupid fun, and the best part is, normies can't even figure out your community exists or how to connect to it, because wtf is telnet? It's also effectively invisible to the three letter agencies and whomever else.