I don't believe that Violence is really the key to a drug free country, so it is NO as Violence is not the key. There should be a study and research approach into How does drug addicts gets these drugs?, the route through which the drugs passes without the law and drug enforcement agencies interfering with these processes. But it is a pity because the drug addicts cuts across not only the low class in the society but a lot of high class and the respected individual of the society are actually  involved in drug addiction.If a Doctor, an Engineer,....etc. can be involve in drug addiction, such highly place  individuals can use their position and money to achieve the drugs at all cost. Members of the law enforcement may also not be unconnected, if the law and drugs enforcement agencies or forces are determine to clam down on addicts, a lot of breakthrough will definitely be achieved.