Predatory Journals Miner. Our most recent miner. Find, research, and judge for yourself if a journal is predatory.
The problem is pretty bad, particularly when those publishing in said journals are rewarded with career promotions and job security.
It is all about the money, from all sides (authors, journals, publishers, and conferences).
Over 5,000 Japanese articles published in predatory journals
The problem is not unique to science conferences and “experts”. There are others out there that qualify as predatory; for instance, some predatory marketing conferences, some SEM/SEO “experts”, blah, blah,… Nothing new under the sun.
On more positive matters, here is a nice third party tool to verify a journal