I've been reading Erik Dietrich's blog, and it's reinforced a lot of things that I either already knew, or had bubbling below the surface on corporate politics. I'd highly suggest you give his blog a read, and his book is pretty good too. I'm going to focus on what he says about interviewing on this post (and maybe more, depends on how long this runs), then I'll try to address the larger issues of corporate politics that he scrutinizes and how I see them.
Let me put up front that, though I too hypocritically use the same techniques when I've had the occasions to interview people, I think that he's spot on in his assessment of the process, and there has been at least one study (it's the 3rd question in, and there's no data just high level on what they found, the second link provides slightly more data) and many more anecdotal agreements with him (or he with others, I don't know or care which came first). Erik's suggestion: "Just don't do it". I haven't had to interview for a few years now, and the last one I did have thankfully didn't include any of the interviewing anti-patterns, though I've had more than my share of those over the years. Erik expounds on his advice in case you get stuck in one of these anyway. I haven't tried any of his tactics, but if I ever go through one of these again, which isn't likely at this point, I'll be sure to let them know that "I’m afraid that your company isn’t a great fit for me at this time. But if you wind up brushing up on your interviewing process and making improvements, feel free to reach out to me again for consideration."