I dislike receiving emails from recruiters, especially when they're multiple times per day when I've never indicated to anyone in anyway that I'm looking for work. The fastest and easiest way I have reduced recruiter email was by just deleting my LinkedIn account. I got them down to like once or twice a week that way. Now I don't get any because any of the ones that continued to email I've asked them to stop.
I consider myself lucky if I get more than one a month. I understand the problem that you and others have with deluges of crap, but some of us are appreciative of any interest we get. The "hot" market seems to be rather geographically and specialty limited.
Recruiter emails are basically spam built from templates. They'll include jobs for which I'm obviously not qualified for if the recruiter knew anything about me. I've received emails that still had the template variables in them or had wrong names.
Having followed up on recruiter emails a couple of times I have to also state that it is a less pleasant experience than going through the employer directly. All your communication is through the recruiter and you get no feedback at all. In the case you have done an on site interview and you got to meet people, having be the recruiter telling you that the employer wasn't looking to move forward, with no explanation whatsoever, makes a bad experience even worse.
In other words, these aren't lists that I think anyone would want to be on. I agree that some areas are better for jobs than others which is why I live where I do.
Most of my recruiter contacts have been direct recruiters of companies, so when I move forward I am dealing directly with the employer.
That said, I haven't found dealing with employers directly to give me any more understanding of my background or information about my progress than dealing with third-party recruiters.
I have certainly received my share of terrible recruiter emails, but only from posting my resume on job boards. LinkedIn has been a steady stream of mostly good hits, with the not-so-good hits coming directly from companies.
I consider myself lucky if I get more than one a month. I understand the problem that you and others have with deluges of crap, but some of us are appreciative of any interest we get.