Other than the smell, I never saw it have adverse effects on anyone except getting the munchies and forgetting things.
It mellowed out some folks who became very violent when drinking alcohol.
I am overall, very conservative, which is one reason why I am so much for legalization. I am sick and tired of our tax money being wasted investigating, prosecuting and jailing potheads. Conservatives are supposed to be for freedom and limited government.
Here's a chance to prove it.
One caveat on that: When a segment of the population have toked themselves into befuddled unemployability, the chosen behavior will be defined as a disease (alcohol abuse, a behavior, as an example) and we'll end up paying them to stay high or to rehab, relapse, rehab, relapse...