You don't think people would be upset if I did that? I wish there were a good forum to do so. Because like you mentioned people could potentially avoid a similar experience.
I agree that you probably should not post the names publicly. But it might be appropriate to email the forum moderator a link to your above story and a link to each of the three postings in question as an "FYI" and leave it up to them as to how they wish to handle it. They might well be interested in hearing that specific companies are abusing the privilege to post free job postings once a month.
Thats not a bad suggestion. Thanks. I wish there was an alternative to glassdoor where people could get this type f information out there, both good and bad. I am kind of put off by the whole look, feel and experience of glassdoor. Its a great idea though.