Alex Epstein is the director of the Center for
    Industrial Progress, an organization he founded
    in 2011. Its mission is to "inspire Americans to
    embrace industrial progress as a cultural ideal."
    He is also a blogger at Master Resource, a "Free
    Market Energy Blog," and a past fellow of the Ayn
    Rand Institute, an organization that has received
    funding from the Koch Foundations including at
    least $50,000 between 2005 and 2010.

http://www.desmogblog.com/alex-epstein

Some of my favorite blog post titles of his:

* Coal is Clean: http://industrialprogress.com/2012/03/12/coal-is-clean/

* Keep Our "Addiction" to Oil, End Our Allergy to Self-Assertion: http://www.aynrand.org/site/News2?JServSessionIdr005=zvtlch4...

* Why We Should Love the Oil Companies: http://www.masterresource.org/2012/06/love-oil-companies-edu... (I think this might be my favorite for its shades of Dr. Strangelove's subtitle)

This is simply not true. There are scads of studies that have established DDT's potential for human toxicity in diabetes and cancer. Not only that, DDT's LD50 is not particularly large.

Salesmen used to drink large amounts of organophosphates to show farmers it was harmless -- now we know that class of peaticides cause serious neurological disorders.

Source?

Or more importantly, where is the evidence that exposure to much lower dosages of DDT causes more harms than millions dead of malaria?

Yeah, but malaria mostly only kills (tens of millions of) children in poor countries in Africa and Asia so it's of no concern to right-thinking environmentalists in rich Western countries.

You're exaggerating. Malaria is a killer, but it's not tens of millions of children per year. The WHO estimates a number just shy of a million, about 50% children. That's still a sizable number and in principle you're right - most of them are in poor countries.

However, the mechanisms that drive this are more complex. A grossly simplified version goes like this: Since the population that's hit worst has no buying power, no pharmaceutical company is interested in developing a vaccine or an effective, cheap treatment. Malaria is very much a poor peoples illness due to a variety of contributing factors: No access to effective treatment, no access to mosquito nets, no proper hygienic conditions, no enclosed living spaces that keep mosquitos out.

Just spraying DDT on every swamp in Africa is not a solution to the problem. DDT accumulates in the food chain, mostly in fat and gets fed to the children you're trying to protect via the mothers milk. It is linked to an increased rate of stillborn and cancer. It's really not the kind of stuff you'd want to use if there's any alternative.