this is Kinocube, a Minecraft 1.8 server with a custom plugin to provide anonymity with chat similar to 4chan and other imageboards

the address is 185.228.81.122, you can connect with a wide range of versions: from 1.7.2 to 1.20.4

you can get banned for the following:
>intentional server lag
>doing anything illegal
>considerable chat spam
anything else is pretty much allowed, ANYTHING GOES

Do not expect things to happen the way you want them to be.