Earlier quoted context omitted.
ghosting is pretty standard in my experience, 1-2 months of interviewing and testing then nothing is pretty standard in the industry
Here (Israel) it's illegal, you can reject a candidate for pretty much any (non discriminatory) reason but you have to tell them about it pretty promptly. It's weird there are US states where it's not a requirement.
Dealing with just a handful of these guys is enough to do away with providing any sort of feedback. Like many things, a few bad apples ruin nice things for everybody.