Sounds harsh but not worth the risk IMO. Not worth risking my drivers license, carry license, FOID (yeah yeah everyone laugh at the IL guy), hunting license, my freedom, or my money. That said, if I hit one and was able to get in touch with a police officer or game warden who gave me the go ahead, I'd absolutely put it out of its misery.

Believe me, I get it. It sucks to see an animal needlessly suffer, and I'm sure it sucks even worse being the deer, but the religious morality argument doesn't hold up in court if it's illegal or deemed reckless. Bear in mind the default death for a deer is due to starvation, disease, or being eaten alive by a predator.