Poplar?

You might find the XDG base directory standard interesting also, solves the problem the meme is about.

Couldnt you just copy the list of instances lemmy.world or a similarly large instance federates with (its in the footer), or grab a the list of Lemmy instances from e.g fedidb.org to block?

I feel that would block most of the network, and doubt there would be much value left in joining whatever unconnected instances left.