<p>The same thing happened with two of my answers <a href="https://stats.stackexchange.com/questions/100173/explanatory-variables-may-bias-predictions/100265#100265">here</a> &amp; <a href="https://stats.stackexchange.com/questions/104085/is-there-ever-a-reason-not-to-use-orthogonal-polynomials-when-fitting-regression/104105#104105">here</a>; it's to be hoped five is enough for the algorithm to pick up on &amp; reverse. More vexing than the tiny "reputation" loss is the thought that a false impression may be given of genuine disagreement about something quite uncontentious. <strike>Whether the downvotes are due to someone's childishness or to some system glitch, the best I can suggest is to ask the reason for the downvote in a comment below the answer&mdash;perhaps you'll get a response, or at least influence readers to disregard it.</strike></p>

<p>On the other hand, inculcating skepticism is probably a good thing. [And @wuber's point that reacting at all might encourage repetition of the behaviour is a good one.]</p>
