Some journal web sites state that the journal is in DOAJ when it is not. Often, the home page carries the DOAJ logo along with logos from other indexing services. 112 more words
This post by Rick Anderson, and the comments that follow, is an excellent introduction to the conversation about the quality of open access journals in general and the editorial policies of the Directory of Open Access Journals. The comments include a conversation joined by important voices like Peter Suber, Richard Poynder, and Jeffrey Beall (of Beall's list).