Walt Crawford has published "Ethics and Access 1: The Sad Case of Jeffrey Beall" in Cites & Insights: Crawford at Large.
Here's an excerpt:
This is the first of a trio of essays: two related to fairly specific situations, one covering a range of ethical discussions. Depending on how you define "ethics," I could also include sections on Elsevier and OA, embargoes, fallacious and misleading anti- OA arguments and the whole area of peer review. Or maybe not. In any case, we lead off with the sad case of Jeffrey Beall.
Since Beall's chief claim to fame is his ever-growing list of supposedly predatory OA journals, and since I'm showing the case for treating Beall as a questionable source, I have to say this: In case you're thinking "Walt's claiming there are no scam OA journals," I'm not—and toward the end of this essay, I'll quote some useful ways to avoid scam journals regardless of their business model.