Marijuana leading people to 'risky behavior'... more like people who can't keep themselves in check when they're experimenting with mind altering chemicals because they don't know any better. I've never known a person to act out of character whilst on marijuana unless there was an underlying issue or they mixed it with alcohol or some other mind altering chemical. Also, studies usually aren't taken seriously by those who partake in them if they're merely done through survey by paper or phone.