The government of the Philippines call this thing as cleansing.  Drug addicts were addicts and they do no good with others.  They are the one who killed innocent people.  When police came to arrest them, they are the one who refuses and fights back.  Reason for the policemen to fire back.  Drug pushers and drug lords should be put to jail and punishment should be death penalty. 

I think it can be achievable like the country of Singapore.  Law enforcement and uncorrupt officials should the one who leads the country to attain a drug free country.