The marketing low-point? The infamous Cliff Bleszinsky sarcastically brags, "I made a video game where you can blow out another man's ass-hole."
And yeah, it's possible. That commercial ends with a quick cut to a man's anus being shot with burning bullets, and overflowing as he screams bloody murder and falls face first to the ground. In fact, it's the sexual subtext of much of the dialogue, marketing and in-game text and actions that is most disturbing.
By encouraging players to pull off such skillshots as "Facial", "Gang Bang" and "Bad Touch", Bulletstorm becomes far more than just another violent videogame. Mortal Kombat's spine-removal and explosive blown kisses seem perfectly reasonable (and very well may be) in the face of Bulletstorm's seemingly complete lack of any social responsibility.