There is nothing safe about marijuana. It's not dandelion tea or lettuce. Somebody just hanged themselves over a legalisation issue in the Netherlands of all places (thought it was legal there). In the houses of parliament! I know quite a few people who have become very paranoid on weed. And some have swiftly moved onto harder drugs for the easy access in certain circles. One thing quickly leads to another. But then let's also discuss alcohol.... Solution? Prohibition clearly not. Warning against abuse is a start, but strongly advising against all use (especially children) is my policy.