In states that have recreational weed the workman's comp figures show that those injured on the job testing positive for weed has doubled while the overall rate of injuries has remained the same. Maybe zero correlation to your contention. But then you said "idiots." For myself I tend to slow down a tad, check my work a bit more, take less chances, I damn sure drive slower, obey all the traffic laws, check my mirrors twice, maybe a little less Megadeth and more Pink Floyd and damn a chocolate frosty taste soooo good. I get it, Mr. thing, some folks have no bidness smoking weed even if their task for the day is walking the dog. What dog? I guess all that begs the question...
Have you ever smoked weed? Outside of your San Fransico bath house that is.