Vindictive Reporting

I just had a game in which myself and another player had a disagreement about how the support role should be played. It was kept civil throughout. After the game, however, I was notified that my offensive language is unacceptable behavior. I never insulted the other players, nor did I use any offensive words. I only suggested that "next time i stun someone try to kill them instead of just standing there" and similar things. I have requested my chat logs along with my sternly worded letter about the automatic and hugrly flawed nature of this new system. I don't want a black mark on my record just because some immature player reported me over a disagreement that was kept entirely civil.