Lemm.ee allows minors out of the same school of thought why it allows federation with nearly all instances there are, including NSFW: liberalism (as in: freedom)

No, your local feed only shows posts from communities hosted on your instance.

The all feed shows posts from communities hosted anywhere in the Threadiverse. The OP wants this, content from anywhere, but sorted/tailored by interactions your local users made.

Effort? Nah the typical post is as effortless as a comment

Hexbear lost its domain and went offline

That works if you never ever want to change your mind about not seeing stuff. Otherwise it sounds like a nightmare

No, they clarified that they want the All feed from across the fediverse to be able to be sorted/curated according to the local instances preferences

Well yes, the whole concept of the fediverse is that of social media as a public service. All activitypub data is public.

Crushing people with tanks

Just a heads up, while it is established that the CCCP killed tons of people on that day, the idea that people were crushed with tanks is disputed in academia and mostly considered inaccurate news reporting.

The famous “tank man” photo shows a guy standing in front of a tank in order to prevent them from moving tanks to another part where the protesters had gone. We have no evidence that he was driven over by that tank.