Unfortunately, people do it because it occasionally works. My dad is the world's worst about that and has shot more deer from his truck than you can shake a stick at. At least he's doing it on private property but I admit, when I was a kid, we hunted the 'long pasture' once.

I remember when I was about 16 or 17 I used to always get in trouble out on the deer lease because I 'roamed'. I'd find some brush at the edge of an oat field or I'd camp a trail in the woods. My great uncle would chew me out for hunting in my cousin's areas. I set up a little box blind at a cross roads and deer would come down this road. It was my place to hunt and I liked to get out early. People going to the back portion had to pass right by me to get to their stands. My uncle drove by one morning in his suburban and waved. He drove about 50yds past and his brake lights came on. BOOM! He shot a nice 8 pt buck that was heading up to the road, not 100 yds away. "there was another buck with him, you can shoot him" Yeah, never saw that one.

To this day, my old man will drive up to my stand and stick his head out the window at the prime hunting times..."see anything?" "Yeah, a big diesel pickup with a dumbass behind the wheel."