Predatory conferences or predatory meetings are meetings set up to appear as legitimate scientific conferences but which are exploitative as they do not provide proper editorial control over presentations, the topics covered can diverge substantially from what has been advertised, and advertising can include claims of involvement of prominent academics who are, in fact, uninvolved.[1][2][3] They are an expansion of the predatory publishing business model, which involves the creation of academic publications built around an exploitative business model that generally involves charging publication fees to authors without providing the editorial and publishing services associated with legitimate journals.[1][2]
BeallPM was invoked but never defined (see the help page).