I really like the idea of somehow discouraging ghosting. It happened to me at a time when I was desperate for a job change. A recruiter for RedHat strung me along for weeks before going silent. It really screwed up my job-search schedule, as RedHat was (at the time) my first choice.

But I'm not sure where the best place is to apply pressure:

(a) privately shame recruiters to the employers they represent, or

(b) publicly shame recruiters so that employers and candidates can avoid that recruiter, or

(c) publicly shame the employers who hire such recruiters.

Also, the anonymous nature seems like a double-edged sword. One could imagine hoax / malicious reports being submitted by competitors and/or rejected candidates. I imagine that once that loophole starts getting exploited, employers will rightfully ignore all the reports.