I don't think marijuana is a gateway drug. i have been smoking marijuana for 3 years now and have not had the urge or feeling to try anything else. I just stick to smoking my marijuana. The only thing smoking led to was junkfood, so i guess marijuana good be considered a gateway drug to junkfood.
weed is only a gateway drug if people let it be. if weed has a level of control over someone where it effects their judgement to the extent of trying new drugs, it's an obvious sign that they shouldn't be smoking it. weed might change someone's opinion on a drug they haven't tried, but that doesn't mean they should act on it. all weed will do is give someone an idea and imagination towards the drug(s). i think it's about time people claim responsibility to the fact that they have shitty will power and self control instead of blaming marijuana as a gateway drug. i know a lot of good people who smoke weed and don't mess with anything else. i know a lot of what seem like weak minded people who mess with all sorts as well as weed. try labelling the consumer, not the product.