@pixelpusher220 @baralheia @noxypaws @AS4gBPS9axYI2RYbEe.snarfed.org@snarfed.org @fediversenews Opt-out is the default of the Fediverse. As a server admin, I don’t actively choose who federates with me. Federation happens as soon as my server “sees” another.
There is a way to change this default towards opt-in, and that’s by whitelisting. Most servers, including universeodon.com, don’t choose to go this route because it severely affects their visibility.
Another problem is that, even if you whitelist, once your content federates onto another server, it is beyond your control. It exists elsewhere. A malicious party who is on another server may interact with it in a distasteful, insensitive, perhaps illegal manner.
The way some servers have gotten around this is by turning off federation entirely. That is an option, but probably not one that most people on the Fediverse want.