Wedge camper DIY

I was camping in Flagstaff AZ. Last weekend and this camper stopped where I was camped. Looked at my GFC and told me that was his design I was using. Kinda stopped me in my tracks that, one he wasn’t aware of GFC and two he pulls into my camp and tells me that, then backs out and drives off. Thought that was strange. What I could see looked pretty well built. Nose was angled and is long enough to shade his windshield