personally i think that all areas of the water are not regulated as well as they should be. i would NEVER get in the water with an instructor or dive buddy that does drugs. my life is in the balance, and i am not going the let anyone screw that up. personally, i am not a drinker or do drugs and i would actually have secong thoughtst of diving with someone who "tied one on" the night before. when it comes to the water, she takes no mercy. always be on best alert when playing in her playground. as for actual drig testing, i am for it. just figure it this way -- what happens if your DI forgets to tell you an important part of your training because their head was foggy. yes, drug test them.