sh.itjust.works Main Community

Hello,

My Lemmy experience is so far so good but there is one little problem. Right now I'm discovering new communities so I usually use All to see every community. And the problem with that is there are a lot of loli hentai, futa hentai and generally porn. I know that I can block those communities individually but it would be easier to just block whole instances like lemmynsfw. Can I do it or instance blocking is only possible instance wide?