I think this way as well. I’m suspicious of filled garbage bags on the side of the road. Due to my exposure (my mother is heavy into true crime) and fascination with true crime I remember looking out the windows in the car since I was a kid looking for bodies, thinking I would discover someone who’s family has been looking for them. Sinister, I know.
I still do this, when I’m not driving and am in a heavily wooded area.