I've smoked weed sporadically for about 6-7 years and there's no way i would ever try anything harder. I don't smoke cigarettes either, for what it's worth. I don't believe weed is a gateway drug at all, mainly because things like coke and ecstasy are so completely different in terms of the way you take them and the "high" they give you. I could understand, for example, ecstasy and speed being linked in some way because of the similar effects, but weed is kind of in a league of its own really. All these "statistics" about 50% of heroin users smoking weed at some point are irrelevant in my eyes, i could tell you that 80% of people who smoke weed had a pizza at some point in their life but that doesn't mean pizza should be seen as a gateway to drugs. I know plenty of people who drink but don't "do" drugs, i know people who smoke weed but don't drink or do any harder drugs, and i know a few people who do harder drugs but don't smoke weed. Depending on who you ask you could make up your own conclusions any way you wanted them to look.