If someone is going to be a "bum," no amount of legislation will prevent it. People may choose to ruin their lives through too much drink, too many drugs, gambling, overeating, overspending, or watching too much TV. If a person is looking for an escape from reality, he'll find it somewhere.

Conversely, many people smoke marijuana and lead normal, productive lives. If you're a well-balanced adult, pot isn't going to single-handedly turn you into a bum.