Considering the amount of whining and moaning other teams did about the RB front wing, I find nothing wrong with him returning the favour. There isn't a single team or team principal that I can think of that hasn't indulged in this. To single Horner out seems rather unfair. If a Principal didn't complain about a perceived advantage that another team possesses, it would seem to indicate that he is not interested in winning, and Idoubt that to be the case, even in HRT!