the one-way federation isn’t a block, it’s encouragement for users of piefed to go and harass hexbear out of revenge

This is exactly how defederation works on Lemmy itself, until the other instance also defederates to complete the circuit

this is nothing more than @rimu@piefed.social weaponizing the platform,

You mean like Lemmy devs weaponize Lemmy? Don’t you find it the slightest bit odd that all the features that could be used against them - blocking, robust voting systems, robust modlog, good mod tools - are conveniently implemented poorly, not implemented at all or outright “downgraded”?

but it should be our choice, not the choice of an admin from another instance.

How does an admin of another instance make that choice for you? If instance A starts going crazy on the blocklist, then Instance B can choose to no longer subscribe to As blocklist