here's my beef with selling to kids. when i was in high school (which wasn't that long ago), you were taught that basically all drugs were bad. they were all addictive and extremely harmful, pot was lumped into that same category.
so, usually the first "street drug" that a kid tries is pot. so the kid smokes the pot and goes, hey, this isn't so bad, what the fuck was my teacher going on about? now, since the kids are taught that all drugs are the same and bad, they may try other drugs that are harmful, thinking that they are the same as weed, because that's how they are taught. they don't effectively educate kids on drugs in school at all.
now, since pot is illegal, and a ton of dealers sell pot, coke and the works, these kids have access to these other drugs as well. so IMO pot is a gateway drug, not because of any chemical in it that makes you want to try harder drugs, but because of a lack of education and the fact that it's illegal and dealers have the opportunity to expose these kids to other, more dangerous drugs.
i don't think kids should be smoking pot until they are properly educated and taught that marijuana is a far cry from meth and blow.
i have seen this happen time and time again, and was a victim of this terrible drug education system myself. smoked pot, it was great, and tried dilaudid and temporarily fucked up my life.