First of all, I have yet to see you acknowledge that the persons placing the deer in the roadway broke the law.
Second, I will breathlessly await your response when a person's felonious actions result in you "not having your vehicle under control".
(A) No person shall operate a motor vehicle, trackless trolley, or streetcar at a speed greater or less than is reasonable or proper, having due regard to the traffic, surface, and width of the street or highway and any other conditions, and no person shall drive any motor vehicle, trackless trolley, or streetcar in and upon any street or highway at a greater speed than will permit the person to bring it to a stop within the assured clear distance ahead.
You are required by law to operate your vehicle in such a way that you can stop within the distance you can see it clear.
People fail to do that pretty regularly, but failing to do so by a little bit means hitting an object at a low rate of speed, or having to swerve around it after already slowing down considerably.
Or possibly skidding off the road at a reduced rate of speed after locking up the brakes if you are being abit careless or reckless.
He swerved and went off the road at a high enough rate of speed to roll the car and take out a fence.
That's not just a little outside the reasonable range of operating a motor vehicle as required by law.
I'm not saying the persons placing the decoy on the road didn't break the lay and don't share in the responsibility for the accident.
However, the driver also shares in the responsibility for the accident.
Putting the entirety of the blame for what happened on the "pranksters" is being driver by emotion, not by logic or by justice.
According to an earlier AP story, Roby wasn't the first driver to come across the decoy that they put in the road that night. The previous drivers were able to avoid the decoy without mishap.