ok I ran out of letters on that last entre.If we start screens then word will get to the public (the way that the media does)and give a bad rep to the diving community.example. when people see a diver wearing a shirt of some narced out diver,frog,shark,or whatever,with a caption that insinuates it as macho or cool, they then look at divers as some kind of glue sniffer,altho they don`t understand. so lets not start some histeria over something that`s not a major issue, besides , your dangerous hardcore drugster doesn`t keep diving,he liquidates his gear for drugs anyway. As for background checks goes. it would be wise of the dive shops to do this when dealing with childeren. (or even women for the sake of rape).So as to cover themselves alittle bit in case of lawsuits.Mite even require that the parents be present at all times.