This strategy was recently implemented in Portugal and Uruguay, with a great deal of success. Check these:
https://mic.com/articles/110344/14-years-after-portugal-decriminalized-all-drugs-here-s-what-s-happening#.hRlUsTE9u
In Portugal, the number of drug-users is going down, as evident from this graph:
Also, the number of Drug-induced deaths have declined from 80 to 100 per year, to around 15.
If you talk bad on duterte expect the death threats come around you and all the filipino will bully you on internet. You should not talk bad on Duterte it is sacred
http://www.gmanetwork.com/news/story/562005/hashtag/woman-hits-back-at-cyberbullies-after-anti-duterte-post