Absolutely not. The fact that we are getting almost 2 digits in CTR for ads placed at the bottom of the article -- an option we would never have considered if the multiple ads format was not allowed -- is the wow factor for us.
With this arrangement, we are hitting two birds with one stone: we are getting users to read our entire article, and we are getting them to click on ads. Whereas before where we placed large rectangles at the start of the article -- users who clicked may invariably left our site without reading our entire content -- now we have the perfect arrangement of showing users what we got and earning from them when they are done reading the content. It is very heartening to know that users are actually reaching the end of the page, no matter how long the article! Hence, users now have two options -- not read the article and leave the site by clicking on the ad at the start of the article; or stick around to read the entire content then leave via the ads at the bottom of the page.
Give it a try. Track it very carefully. And see if it works for you. If not, big deal, simply remove it. It is hard to make decisions from what people say here. Remember, it is easier to complain and whine (and we have lots of that here) than write about good experiences.