I agree only in part. Specifically, I agree that rejection brings out the worst in people and sometimes it's better to not engage in follow-up conversations about rejection. I have interviewed my share of problematic applicants and we should not make excuses for employers to behave badly due to bad applicant behavior.

Courtesy starts with the giver. If someone chooses to not be equipped, then you have done your job by attempting courtesy, nothing more is required.

While there's a lot of awful behavior, I have found complete silence (no initial rejection) triggers worse behavior. For example, silence leads to people constantly reaching out, rightfully wanting to know status. Moreover, it greatly encourages the psychotic people to bombard you with craziness via any means of contact. For that reason, an initial response that a person is rejected is enough typically.

Courtesy is not hard and saying so is concerning. While people may have different reactions, a simple sentence is a courtesy and a thank you, nothing beyond that is required. Still, I admit reading this site sometimes makes me think basic humanity is a challenge for many people. Unfortunately, those people seem to be in charge of hiring at many companies.

All you have to do in a job context is respond at least once - thank you, but no. If the other person does not see a simple email as courtesy, that is their problem. A response is a universal courtesy, no response is a universal insult. I can understand not wanting to engage further, however.

No response at all is also demeaning. It takes seconds to formulate an initial rejection response. If someone presses you, simply reply with that dreaded canned response + simply use their name. If you want to further personalize things in either case, you pick 1 detail you remember to sound more genuine, which for a functioning human should be quite easy.

If you want something more dry in a follow-up, you can say that for legal reasons, you are not allowed or comfortable discussing further, but you wish the person luck. That covers all the normal people, and for crazies, you have no choice either way but at least this has a chance of getting them to go away. What you are saying is that people are not even worth seconds of your time, especially people who potentially invested hours, weeks, or even months in the process. I would hope any reasonable person is above this.

Lastly, a response is important because it allows people to prioritize and further their job search. If you keep someone hanging, it can have huge implications that I should not have to explain. There are many other problems it can cause as well. As an example, I once applied for a job I thought I wanted because the company confused me with someone else and their SOP was silence. They stopped responding to my inquiries which insulted me so much, I rejected their subsequent offer when the mistake was caught. Another example - a company scheduled interviews for me and just didn't show up, making me have to leave my wife alone in the hospital at the time which I only did because my job search was that important at that time financially.

Honestly, I'm so tired of the attitude of companies and people on here validating unprofessional and awful behavior. If it were legal and without issue, I'd make a list and publicly shame. The only redemption is that when someone can't even be human enough to respond to you, working at their company would be a miserable experience. Still, that does not help when you waste weeks, months, or even years going through this nonsense with ego tripping weirdos doing hiring these days, ghost jobs, and complete psychos. I've been interviewing candidates for over 20 years and I do not say this lightly that the current process is disgusting, awful, and unacceptable at a disturbingly large number of companies.