Originally Posted by
BarnesX.308
The hunter can say he did't shoot a real deer. But, I think it's illegal to shoot a decoy on someone's property from your vehicle as well.
Yep.
I'd imagine that in all 50 states it is illegal to discharge a firearm from a public road except for self defense. I'd also imagine it is illegal to shoot onto someone else's private property without permission.
Even if there aren't laws banning these sorts of things, there are other very broad laws, such as "public disorderly conduct" or "endangering the public safety." The laws these days are pretty much written so that prosecutors can convict nearly anyone they want.