For comparison, Google ads are displayed in a right column by default, and you can't simply buy your way to the search results column. Google displays the ad there only when it considers the ad as relevant as a search result, and relevance judgement is something you already trusted Google for.
You are supposed to know this, aren't you a SEO / AdWords expert?
In Google's case it's also much more obvious that they are displaying an ad and not a regular search result. If you claim otherwise, why don't you copy the yellow background and "Ad - Why this ad?" text in your advertisement and tell us where the CTR goes?
I've seen you say that Google is evil and claim a moral high ground a number of times, and now you are justifying something with "but look, Google does it too"? Even if you were correct, which I've shown you aren't and you know it, this would means you are just as evil as Google.