I do not think the people in front of Ed Haywood did informed consent.
I know that I did not as a draftee in basic training. They fired 30 caliber machine guns over us as we crawled through dusty dirt fields, in day light, then watered to change to mud, for the night version. There were logs around "shell holes", which contained 1/4 sticks of dynomite, with a shovel of mud on top, to shower us with mud.
They assured us that the bullets were no lower than 36 inches from the ground, and as long as we went under the barbed wire, not over, we were safe.
They were not using blanks, we could hear the loud ZIP of them passing over our heads, and the height was clear, every fifth was a tracer.
The rules in the military are quite different from civilian life.