Gui-Gon used The Force to cheat at gambling (the chance cube) and in business negotiations ("credits will do fine"), and even to commit theft (mind-tricking Boss Nass into giving him a bongo).
It's not exactly slaughtering the younglings, but if a man who used The Force so dishonorably taught the ways of The Force to a nine-year-old, could he not unwittingly have led the child his first few tentative steps down the dark path?