High tech deer control

Dad and I spend alot of energy, time and money trying to minimize the damage that deer inflict on our crops. Every year it gets worse because we are sandwiched in by houses and little pockets of cover give the deer carte blanche in terms of life style.
I thought I might get the situation under control by hunting last fall. But the deer have become nocturnal and hunting them became out of the question.
So I applied for a deer depredation permit for this spring and summer and prepared to spend time waiting for them to show up at night.
In the meantime, Dad ordered some spray that you apply to the plants that is supposed to repel the deer. He also lined up a small, fence-like material that he thinks would work.
It didn't take long for the deer to find our overwintered spinach. As soon as the leaves were ready to pick, the deer started to do the job for us. Dad and I prepared for the worst.
Our first option was to shoot them. I did not relish this thought for the simple reason that I didn't know if they were coming out after dark or just before dawn. My guess was just before dawn. But I had seen them around the neighborhood just as it was getting dark so they are probably doing both. Then came a move that surprised both Dad and I.
One day Dad decided to move our field truck next to the spinach in an effort to get the deer to get used to seeing it. His plan was to sit in the back of the truck bed and shoot from there.
Well, the plan did not work. But not for the reason that you may think. By moving the truck into the field, Dad had played the smarts that the deer exhibited into our advantage! How? The deer avoided the spinach row because they thought someone was in the truck! Wow, what a great idea and no body had to die nor did I have to spray anything to achieve success! It has been two weeks now and the deer have left the spinach alone.
To prove that our truck idea was not a fluke, I have worked in a field that is just below the spinach patch. I can see the deer tracks coming out of the woods and then they veer hard to the left to avoid the truck and the spinach row!
I admire those deer for their cunning and wish them all the luck in the world as long as they stay out of my crops! But sometimes you have to use their smarts against them and this was one of those times. Instead of knocking ourselves out, Dad and I stumbled across an idea that worked with nature instead of against it.