@tasket @rrb @Gargron It was largely defensible to federate with Threads when the problem was just that it was corporate and undermoderated - provided you could do your own moderation of them.
It's not defensible to federate with naziverse instances - that is, instances which explicitly allow and encourage hate speech. With the new policy announcement, including a how-to tutorial on transphobic hate, Threads has clearly become the latter.