i like vaporizers more than pipes or anything else. i made mine mcgyver style out of a soldering iron and a sobe bottle and a block of wood. it works wonders and gets me ripped from a pinch of weed. from my knowledge of vaporizers what it does is heat up the THC until it turns to vapor and then you smoke just the THC. so i don't believe that smoking the weed afterwards would do anything because i think all the THC is gone. also mine does not conceal the smell. well it makes it easier to conceal the smell. all of the smoke is contained within the chamber until breathed in, so as long as you breathed it out a window or something i think the smell would be greatly reduced. i would recommend making, not buying a vaporizer, they're way to overpriced and most of the time don't work. my shitty one works really good though, also don't try the light bulb thing, most of the time people mess up and waste some good weed.