I don't get why you've got your panties in a twist over this, it seems fairly clear from the information Poop gave that although dust does have skin in it it's going to be a smallish amount.

I'm sure there will be parts of houses that people live in which have more human skin than others that people spend a lot of time in such as beds but even then it's probably not all that much of what dust is overall. If the main place that people are brushing off dead skin is in the shower you'd imagine most of it gets washed away anyway.

I agree that none of this is rigorous but your claim isn't either and what has been spoken about certainly points in Poops direction.

All that being said it certainly shouldn't be in this thread.