"I dunno - they put me through this stuff, or some variant, on my way in. So now I guess it's my turn to dish it out on the people trying to climb in after me" seems to be about the order of reasoning in place behind these "methods".
† As in, was an open problem in the literature and/or folklore for years before some (now) highly respected came up with the first reasonably adequate (but like as not, overcomplicated and/out outright flawed, at the outset) solution. We know the "usual suspects" that get asked -- I don't need to list them here. But ff you genuinely think that any candidate you can (reasonably) expect to find in response to your muddled job postings will genuinely be able to solve these problems for you at the whiteboard for you -- from the void, as it were -- as opposed to regurgitate carefully practiced solutions they found from cobbling together lists of "problems Google and FB like to ask" -- you're seriously kidding yourself.
There is nothing to suggest that parent poster has bad social skills or that his job posting was muddled.