Let's face it: marijuana should not be illegal, and the hundreds of thousands of (mostly non-white) prisoners incarcerated for marijuana-related crimes, should be pardoned and released.
That marijuana isn't very good for you is pretty much generally agreed, and it isn't something heavily used by successful, discerning people. As for getting high on the job, this is strictly for people with no ambition whatsoever.
We're beginning to cool down from the early excitement about legal marijuana. Now let's just get used to it and handle it a bit like we handle Jack Daniels: with caution.