1. Personal choice to take on the few health risks. 2. Consumption does not limit you to smoking. 3. It's not physically addictive, I've read countless independent studies about addiction to weed. It's always psychological addictions. Beyond studies I've read there are the dozens of friends I have who quit for a period of time to reduce their tolerance, none of them have symptoms of dependence. 4. Cannabis has positive effects as well. The government has it classified (schedule 1 is highest if I remember correct?) with drugs of no medical use. Cannabis has many medical uses. 5. In adults the risk of developing mental disorders from weed is significantly less than in teens.