Sorry but I don't buy into your idea of legalising drugs. In fact, the very danger that emerges from not legalising drugs is the killing it attracts at the cartel levels mostly and the extreme caution that is taken by the various groups to cut the trails that follows in a drug burst compromise.
Another effect is in the case of price. Banning drugs creates a scarcity and with increase demand, I becomes the more expensive but trust me, its got little or nothing to do with its consumption.
Most of those involved in drug abuse is actually for the feeling thy tend to get out of its intake or the pressure they hope to escape from life. Others might be for the purposes of perpetuating other crimes not limited to abduction. I dont know but, I don't see legalisation of drugs to be a solution to this.