I used to smoke alot of weed for over 6 years....as in multiple times daily and it definately effects you, including driving....with that being said I have no problem with people smoking weed. But acting like it doesnt do anything is just ludicrous.
I haven't smoked weed in about 5 years now..so Im not biased, not that I don't want to. I just realized I couldn't smoke and run a successful business.