In many states, warranty's are seen as contracts of adhesion. We have no say in the terms, so an vaguery in the language must we judged in our favor, not the favor of Chrysler. The existence of a hitch is not proof of towing. No lights would help reinforce that stance. The problem is, it would be costly and time consuming to push the issue. You may win in court, and spend more than a repair getting that win. I personally woudn't risk it, but to each their own.
On the gas model, you have to modify an underbody cover. If you have to do the same on a hybrid, even taking it off wouldn't help. Unless you took it off, had a spare unmodified cover, and touched up the paint scrapes where the brackets attach. That sounds like a **** of a lot of work to me.