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.
The nihilism you see in a lot of nerdy spaces in this vein is so upsetting. Tech workers are so unbelievably critical to the functioning of the modern world that if we collectivized and made demands, we could utterly bring the global system to a halt until those demands were met. But so many are so well sold on this "rockstar programmer" horseshit. Like by all means, get your bag, we all need to, but personally I sleep better knowing no software I've made is helping target guided rockets.