Valve stem removal.
Funny you say that. I have a similar story.
Back in college I had a good bow hunting spot a fair walk and a river crossing made me think I’d have the place to myself. One day, midseason, I got there and plastic grocery bags were tied to the trees every 30-40 yards. Turns out there were a couple of squirrel hunters that used grocery bags instead of flagging tape to be sure they wouldn’t get lost on their expeditions to fill their backpacks full of squirrels.
One day I was sitting in my stand with a few squirrels hopping around me. One of the squirrel hunters appears and walks toward me, following his grocery bags. As he got to about 50 yards I stood up and waved my hands at him. He looked up, made eye contact, and continued walking. I sat down as he passed my tree. Moments later I heard a CRACK as a bullet wizzed into my tree, followed by a thud as a squirrel hit the ground underneath me. The “hunter’s” wife, who was carrying the bags of squirrels for him, scurried right underneath me to pick it up. I have no idea if that bullet was 12” or 12’ from my head, but I know it was way too close. With the memory of the northern WI deer hunter massacre fresh in my mind from the previous fall and a language barrier that would have made communication impossible, I just sat as still as I could, given the trembling from adrenaline, and ignored them.
A few days later I was talking to a farmer in the area and told him the story. He mentioned that he knew the vehicle and he’d take care of it. I never saw that hunters truck again and the next time I talked to the farmer I asked what happened. He said he cut all 4 valve stems off the truck. I laughed a bit, but was always nervous hunting there after that in case those guys blamed me.