I have also picked up the vaporizer method, I feel that it is definitely the safest way to smoke because it doesn't smell, doesn't smell up the room and you basically taste nothing except for a strange tasting vapor that just seems like air. I like it but i prefer bongs (seems like Phelps does as well).
I have a sister younger than me, who has admitted to smoke weed before, yet she has never drank alcohol (allegedly). As an older sibling, looking out for the well-being of my sister, I feel much more comfortable with her taking a few hits of a J once in a while then wandering around town drunk and possibly being caught in a driving situation. But hey, that's just me.