Drug use is a personal choice of the individual, and where used with moderation is completely harmless.
The prohibition of drugs is a very recent development, and it has failed to work. THe main results of drug prohibition seem to be the means by which massive criminal organisations are funded. In Mexico this has led to the death of tens of thousands of people as they fight for control of the drugs trade. Far from stopping or even diminishing the use of drugs, drugs have gained a forbidden cache amonsgt mainly uneducated minorities, and drug use seems always to be competing with the previous generation for the accolade of all time high use.
Careful and moderate use amongst those more aware of the dangers, continues undiminished. For the average well paid white person the chances of prosecution for using are very limited indeed, so prolific is the occasional use, except for very rare instances where professionals get busted and loose jobs where illegal drug use is professionally unacceptable (doctors, dentists, teachers). Sadly drug laws tend to be used to victimise racial minorities whose widespread criminalisation re-inforces racist views ghettoising coloured communities to such a degree that poverty and degradation becomes self-fullfiling. Entire neighbourhoods have become no-go areas where drug barons rule - no police can tread. Mexico is overrun and in a state of crisis.
There is another alternative. Maybe the government should not be such a nanny. Maybe we would be better off controlling the import of drugs; taxing them, and where money is now fruitlessly spend on the policing of the prohibition of drugs the money should be re-diracted towards education on the effects and dangers of drugs so as to encourage moderate use.
Reduction in the use of tobacco has made great strides and now the world's greatest drug is in decline in the West where education and discouragement has been in place.