I just would like to note that while the original Beall's list web site (scholarly-oa.com) does not host the list anymore anyway, I have recently found a web site https://predatoryjournals.com/ which seems to build on and expand this list (see https://predatoryjournals.com/about/ )

See also the related question https://www.researchgate.net/post/A_new_site_listing_predatory_journals_What_do_you_think_of_it

This is an important issue and there was a serious discussion on this topic in a thread; https://www.researchgate.net/post/What_would_happen_if_WE_ALL_consult_Bealls_list_of_predatory_journals_and_refrain_from_the_possible_probable_or_potential_predators

Dear @Robert, let me bring some more related threads to your research question. There are fine answers there.

https://www.researchgate.net/post/Predatory_Publishers

https://www.researchgate.net/post/Why_do_authors_publish_in_predatory_open_access_journals

https://www.researchgate.net/post/Can_we_hold_members_of_staff_and_freelance_collaborators_of_predatory_OA_publishers_legally_responsible

https://www.researchgate.net/post/Would_you_cite_or_rely_on_literature_published_in_a_suspected_predatory_open_access_journal

https://www.researchgate.net/post/How_can_we_collect_information_on_non-predatory_professional_Open_Access_publishers_independent_OA_journals

https://www.researchgate.net/post/If_you_consider_an_Open_Access_publication_is_a_scan_of_Bealls_List_of_Predatory_OA_Publishers_part_of_your_publication_process

https://www.researchgate.net/post/Did_you_delete_the_invitations_to_publish_in_an_open_access_journal_without_checking_whether_the_journal_is_an_ethical_or_a_predatory_one

https://www.researchgate.net/post/About_Bealls_list_of_predatory_publishers_What_is_the_basis_for_quality_of_a_journal_publisher_or_the_journal_itself

https://www.researchgate.net/post/Do_you_have_knowledge_about_scams_in_the_academic_world

https://www.researchgate.net/post/Attention_Potential_possible_or_probable_predatory_scholarly_open-access_publishers

Thank you for listing of several many of the other questions regarding Predatory Publishing.  When I first posted I was not aware of previous questions (I have since discovered how to search for them).  I do hope we can get some specific stories here of positive and negative experiences with the predatory publishers.

I personally think this thread plays multiple important roles when learning from each other should be viewed as our primarily joint interest. Thus, we shall continue sharing our information and knowledge on the matter with each other.

How to deal with predatory publishing should indeed be every serious researcher... and academic institution's big concern.  Additionally, there are some big issues such as the online services which I call them "The Article Service Providers". These companies can easily publish your papers even in a considerably large number of reliable journals. It's why people with my knowledge can easily questioning the baseless reports from particularly undemocratic governments. Here I intentionally avoid to not mention any specific names/countries, but I know in many countries around the world where the whole education system is corrupted, the propaganda machinery in such countries proudly, but falsely,  report a long list of "published papers" and thus view such a list as an index for their "successful" governing.

So next time when you see a report from an undemocratic country from e.g., Middle East, don't believe it because even if the majority of the papers are truly published in reliable journals, are simply ordered by either the individual claimed author, or by the whole department.  

But the truth is 80% of the authors mentioned in those annual "successful"  list of international published papers, and working in such corrupted education systems, can impossibly publish in English because they simply are not trained in academic writing, and particularly in a language such as English.

And now, the last but not least, I'd like to raise up the issue of many conferences. Many conferences promise authors to publish their papers because there is low supply. Whereas, more serious conferences with very low acceptance rate, easily reject your papers because simply there is high supply. However, besides the issue of predatory publishing, the whole publishing thing is, more or less, plagued by some dirty politics and stupid policies as well. 

Thank you Dr. Babaheidari,  I do hope this thread is instrumental in helping someone avoid a bad publishing decision and that we can raise awareness about the predators.  You have several points that I need to consider further, and your final issue of the conferences is a growing problem, I almost got caught up in trying to attend one of them.  I am curious though about your concept of "The Article Service Providers" and want to know more about them, or please provide a link regarding them.  Thanks again for your input.

Thank you, dear Prof. Robert Wolff!

I've termed that concept (i.e., The Article Service Providers) because, as you know, nowadays we live in an ever-growing information-intensive societies which are facilitated by Information and Communication Technology (ICT). Thus, in such digitalized societies and via online Internet-based services, you can easily buy services from those article providers in order to get your whatever article published. In other words, via those predatory let us call them "predatory article providers", all types of services can be brought so to speak. At the moment, I don't have the exact statistics, but I guess it's about a billion dollar business. What I've statistics about is the name of a long list of countries and educational institutions where the education system is corrupted and thus it's "culturally" "OK" to, in the best cases, pay some amount of money to one of those predatory article providers in order to publish your paper. Every year millions of undergraduate theses are ordered because as I said: in those "academic cultures" it's viewed to be "OK" to do so. That's maybe one of the major explaining factors behind why they cannot build even a functional and safe car :-)

Ali Al-Naji - Thank you for the excellent response! All of the points are useful for consideration when looking at a journal, and any of these should be a reason to look elsewhere.

I just would like to note that while the original Beall's list web site (scholarly-oa.com) does not host the list anymore anyway, I have recently found a web site https://predatoryjournals.com/ which seems to build on and expand this list (see https://predatoryjournals.com/about/ )

See also the related question https://www.researchgate.net/post/A_new_site_listing_predatory_journals_What_do_you_think_of_it

Thank you Dr. Sergyeyev! The predatory journals list appears to be quite extensive. It may have some publishers that are not predatory, but maybe a little questionable. There needs to be clear criteria for this designation and a wide network of professionals to provide input.