Because doing so would not be decorous, and there's no practical reason to do so.

The most practical way someone could act on the opinion I expressed, if they find it useful, is not to sit and laboriously compile a list of individual institutions. It's to take that opinion under advisement in the course of the due diligence they should already be doing in their college search.

As for the last question, if I had any fiduciary responsibility, I would advise you not to believe anything posted on an Internet message board, because the commenters are largely just a bunch of anonymous yahoos who like to troll high school juniors and seniors as a sort of perverse hobby.

Probably for the same reason their username is "mumblemumble" rather than "Ted Anderson from New York". This isn't Facebook; don't ask people to dox themselves.

If you want people to name and shame, ask for a list of offending institutions, not individual examples. (Also, fact-check that list, rather than blindly accepting accusations made by internet randoms, but that should go without saying.)

I didn't ask about their real name, I asked about the college they were talking about, which hardly exposes them to doxing.

The more information attached to your account, the closer it gets to revealing your true identity.