I am going to drive by the hunting area and blow my horn continuously so that it scares the deer away.
The hunters won't appreciate that much. Why do you want the deer to escape the hunters?
I do not want the deer to get shot by the hunters
Hunting is legal with the correct license. It will make the hunter's angry if you blow your horn and this could make the hunters come after you. You need to mind your own business and if you do not agree with hunting then get a petition together to stop it in your area.
I will go blow my horn anyway.
Consider going with a petition instead. You're really going to anger a lot of people by scaring off all the deer. Three are better ways protest hunting than making everyone mad.