Personally, I don’t see any more of a threat from pot than I do from alcohol or cigarettes.
The trouble with legalizing pot is that you open the door to legalization of much more potent and dangerous drugs like cocaine and heroine.
I think alcohol and cigarettes are worse than pot.
Cigarette smokers generally smoke all day every day for years, putting them at risk of a whole host of illnesses.
People who get drunk are an abusive, violent dangerous lot who put everyone around them at risk.
The worst people who get high will do is eat all your cereal and make you do the driving because going that fast freaks them out.