I'm not saying there shouldn't be any moderation. But there's a difference between deleting a post and preventing whole communities to be accessed because of a subjective sense of what is the correct viewpoint on [topic], be it political, ideological or else.
I could imagine a setting where other instances' posts/communities aren't shown on the All page, but could still be subscribed / viewed by the user if he requests it.
Even though I don't particularly like or agree with the attitude or points of lemmygrad users, I still think there should be no blocking/defederation on instance level.
IMHO it's a fundamental design flaw of lemmy, that the instance administrators have the ability to prevent their users from accessing content from certain other instances just because of their different (political/ideological) orientation. Being exposed to other opinions, even though you don't like or agree with them, is very important. Yet this seems to become an increasingly rare phenomenon. Even if an instance doesn't want to promote the posts of another, the users should still be able to decide on their own, which community to subscribe or block. I'd love to see more features for that.
From reading the comments in this or other threads, I can see that it wont take long until lemmy will go the same echo chambered and biased way reddit went and ultimately this will be its demise. Alienating everyone who questions the current development with "Just go somewhere else" or "Get lost and host your own instance" is certainly the best way to go for ensuring only the right people stay for the infinite circle jerk...
Ugh... exactly what we need: more computer generated "content" optimized to generate clicks instead of something of actual value...
This is indeed a difficult problem. Especially as laws and their interpretation are highly dependent on the hosting location.
Hiding posts behind warnings or only showing them only on user request are on the top of my head.