@JonCrow: I can't speak for the other mods, but I don't have a problem with threadjacking for Ektoplazm's cause.
@Procyon: I don't buy the idea that cannabis is a gateway drug. It's true that the overwhelming majority of people who do heroin will have done cannabis first, but that's just because cannabis is much easier to come by and less dangerous - it's difficult to imagine there are many people who have been presented with the opportunity to do heroin who weren't presented with the opportunity to do weed first, and difficult to imagine why they wouldn't have taken that opportunity. Whether cannabis is legal or not has little bearing on this: as long as heroin stays legal, the only cannabis users who will go on to use heroin are those who don't mind breaking the law, and those people are going to be cannabis users whether it's legal or not.
The fact is, most people who try cannabis will not go on to try heroin. I believe this is especially true in the psy scene, where the people who take drugs are relatively clued up about what they're getting into, and take drugs for recreation rather than out of desperation; I for one have never been offered or seen people doing heroin at any of the places I've been where psychedelics are sold openly. Perhaps it's different where you are, but over here there's not much intersection between users of things like acid and mushrooms and users of things like heroin (though I'm sure that both groups smoke weed too, for the reason I've already mentioned).