I learned a lesson about this back when I was a land surveyor doing a lot of public road work and layout years ago. I had to walk a lot, sometimes in thick weed

I learned a lesson about this back when I was a land surveyor doing a lot of public road work and layout years ago. I had to walk a lot, sometimes in thick weeds, on the shoulder of many public roads and highways. In many places in the US at least, there's always at least some litter and much of it was alcohol bottles, needles, and prescription drug bottles. It made me realise how many people drive while drugged on some substance.