Micah Sweet
Level Up & OSR Enthusiast
Ok, that is alien to my experience, but fair enough I guess. Not my site.I think the logic for having it mutual by default is stronger, because the block is probably less about opinions, and more about interaction style.
If you have had negative interactions that call for a block, knowing that they may continue to interact with your posts, even when you cannot see them, may tempt/lead you to drop the block to check... thus negating the usefulness of the block.