It seems like people think you're commenting about this because you want them stopped, which doesn't seem to be the case to me. You just want it acknowledged that they did this shitty thing. I agree that it's shitty and I assume it's not actionable and think you're right to just be right out in the open saying "well, they stole our design and got away with it... more power to them." I do wonder if HN leadership has any comments on this type of behavior, because it really does look shitty coming from one of their teams.