[robertpaulsen]

"What is the "legality factor"?"

That people who use one illegal drug are more likely to use another illegal drug than those who are currently using a legal drug like alcohol going out looking for a drug dealer to buy crack.

[tacticalogic]

That people who use one illegal drug are more likely to use another illegal drug than those who are currently using a legal drug like alcohol going out looking for a drug dealer to buy crack.

So you are saying that alcohol's legality is mitigating it's effect as a gateway drug?