The problem with pot being an illegal counter-culture sort of drug for so long is that culturally there are not good boundaries established in our society.  It's clear that showing up drunk at work is not socially acceptable.  But people have been sneaking around smoking pot for so long it is going to take some time for proper use to sink into everyones' head.  "Getting away with it" was a part of the counter-culture allure, but that's over.  Your mom eats pot candy now, so it's not a very good act of rebellion anymore.