As someone with asthma, legalizing has the potential to make my life much more miserable. If people could smoke it in public, I'd run into that smoke, which is thicker than cigarette smoke, and frankly, gives me a blinding headache if I as much as smell it. And I know it is more carcinogenic than cigarette smoke ...

And have witnessed the slowed reaction time stoned folks have - driving under the influence of it would be realllllly bad ...

One report you might find interesting:
http://www.straightdope.com/columns/...s-of-marijuana

I have mixed thoughts on legalization - I see no reason it shouldn't be available for patients who need its anti-nausea effect, etc., but that could open the door of course for more availability in general.