I'm amazed there's no discussion in the article about Palantir's role in Gaza and their development of Lavender and "Where's Daddy". That goes beyond the gray areas that the author mentions.
Given that it's a site run by a startup incubator with opaque moderation and a strong American bias, I would imagine that most things that make "line go up" are ok.
I don't even think it's always about "line go up". I've talked to real life engineers who evidently have no ethical bar whatsoever--if the technology is cool and complex and an interesting technical problem, they'll work on it, regardless of the real-world application. "Whether my code is used ethically is someone else's problem. I just love technical challenges!" You absolutely see this mentality on HN as well.