prOOne
(the Taliban were pretty effective at that but we helped kick them out)
Actually, that is about 180 degrees out. They did some low-level eradication in the early days of their rise to power. However, they then realised the income they would gain from it was to valuable.
I would strongly recommend Gretchen Peters excellent (and very readable) book - Seeds of Terror: How Heroin is Bankrolling the Taliban and al Qaeda.