See the problem is is that drugs are becoming so illegal and the technology for tracing and detecting drugs is so advanced that people are resorting to more and more desperate means of getting high. Amphetamines and designer drugs for instance. Before you know it, the only form of intoxication that will be availble aside from alcohol, will probably be inhalents.
I disagree, the US government really sucks at preventing drug importation or use. They've tried pressuring other nations into destroying coca crops...so how has the street price of cocaine per pure gram dropped hundreds of dollars in the past decade?
A few years ago the US tried to prevent the growth of poppies in effort to halt the manufacture and importation of heroin from the middle east. Plan backfired and Afghanistan turned out more raw opium than ever before, heroin prices in north america are at an all time low of just $4 a bag in some cities.

Acid is still out there, you just need to know people.
Nullific Reviewed by Nullific on . wheres the lsd, oh the dea has it Who's Got the Acid? These days, almost nobody. By Ryan Grim Updated Thursday, April 1, 2004, at 10:38 AM PT Researchers at the University of Michigan started tracking the illicit drug habits of America's high-schoolers in 1975. Despite the inherent difficulty of conducting such surveysâ??kids are excellent liars and exaggeratorsâ??the Michigan team has established "Monitoring the Future" as the most reliable guide to drug-use trends in the United States. MTF has documented the rise Rating: 5