These are all likely enough to contribute, but there's one big one.

If you don't say anything at all, the applicant has nothing to go on for a lawsuit against you.

If you say anything, and the applicant is a malicious litigant, you just became a potential paycheck via settlement.

If you're hiring a dozen people a year, you can probably ignore this. If you're hiring hundreds or thousands, and thus many times that number of applicants, you're going to step on that landmine eventually. Better then to have a company-wide policy "no feedback ever"

I hear this about lawsuits a lot, but it doesn't really track for me. If a hiring manager says, "we decided to pass on you because you didn't go in depth as much as we hoped on how you would handle latency," why does that open the company up to a lawsuit anymore than no answer?

I could see if the feedback was "we wanted someone who better fit the culture," but giving a specific answer on a core hiring criteria doesn't seem like it would cause a problem.

In reality, I think the most likely reason is what others have mentioned, that candidates would argue the point.

I've been hiring people for a while and I use my "common sense" to violate conventions because of humanity, but I think you'd be surprised how defensive it becomes.

I always tell people why they didn't pass the interview, or why we didn't select them. Usually in a reasonably detailed way.

A plurality of individuals have tried to argue with me, that I didn't understand them (which, if true, could be a communication issue and thus: still an issue). Some try to litigate the issue (not in a court of law, but to say things like "but you didn't say that on the ad" (knowing how TCP works shouldn't be on an ad), or "I can learn" etc). A minority of those will go out of their way to hound me on social media.

My "HR" person doesn't get any of that because she gives no reason.

I'll continue to do it, because I think it's the right thing to do: but there are people in the world who disincentivise it. And after all; you're rejecting someone for a reason, so there is a higher probability that you will interface with someone who is as described: as they might not be finding work and thus circulating more and you are rejecting them for a reason... which could be related to attitude.

Indeed. The closest I've ever come to "arguing" (quotes very much intended) was when a recruiter called to give me feedback, and followed up by asking if I would like a call back if a more junior role opened up.

I told her that I respected their opinion but that I disagreed that I wasn't ready for the more senior role, and so I wasn't interested, but appreciated their time nonetheless. And I was appreciative. Although I predicted as soon as the interview was over that I wasn't getting an offer and why, having confirmation helped me refine where I messed up in the interview.

> A plurality of individuals have tried to argue with me... A minority of those will go out of their way to hound me on social media.

Which just reinforces why a rejection transitions to "no contact" most of the time. I try to make sure candidates have no contact information for this specific reason.

> If you say anything, and the applicant is a malicious litigant, you just became a potential paycheck via settlement.

Do you have examples? I know this is a real fear, but I've never heard any examples of lawsuits except for issues of discrimination due to age, gender, and ethnicity.

Right, and a malicious litigant will argue that the feedback they received represents discrimination against a protected class. It doesn't matter if they're wrong so long as you're still forced to come to court to defend it. They just offer to settle for less than what you winning in court will cost you.

The article linked in this thread claims no one has ever sued based on constructive feedback: https://news.ycombinator.com/item?id=22258113

(Not that I give it when rejecting most candidates, because I don't want to deal with an argument. In practice, I only gave constructive feedback once, and then posted it on my blog: https://blog.andrewrondeau.com/software/careers/interviewing...)