I had trespassers ride right under me on their 4-wheeler one time. They were all over the place and they had to have seen me as I am on a tree, in the air, wearing blaze orange. I would be too afraid of getting shot to do that to someone even if I didn't have the courtesy to leave after seeing them. They were trying to drive me out of there I guess. I yelled at them good. I am sure it scared the guy on the back of the four wheeler. The driver seemed to stupid to get it. Never saw them again after that. I am guessing the passenger talked some sense into the driver. I sure wouldn't want a guy with an automatic 30-06 yelling at me!
To answer your question, I would have been discouraged but I would stick around. Never know when deer come out after they hear the threat leave the area.