i think that the point that dawn was making was that judicious use of de in the coop area (which is more often than not devoid of blooming plants) is in no way effecting the honey bee population, because bees are not interested in manure, dust, and chicken feed.
as a biologist it has been my experience that bees are drawn to nectar and pollen, as opposed to chicken poop and dirt.... go figure??!!
so using de on roost poles as a whitewash or using de as a dust in the chicken feed (for internal parasites) has no effect on the honey bee population what-so-ever.
of course if you ran around the yard and indiscriminately dusted blooming plants like monardas, echinacea, or yarrows (which we grow specifically for the honey bees) the honey bees might suffer a small casuallty ratio... but bees are not stupid, how long have they been around?????
if they encounter an irritant (ie de), they bathe and dispel the irritant. nature has a way of working these things out long before the human "virus" began interfering with their natural cycle.
res ipsa loquitor, (he knows of what he speaks) latin for the uninitiated