Here’s an odd anti-FTA argument:

A negative fallout of the South Asian Free Trade Area (SAFTA) agreement could be an increase in the narcotic traffic in the region, said Dr MM Bhatnagar, member of the International Narcotic Control Board (INCB). Releasing the annual report of the INCB [pdf], Dr Bhatnagar said that past experiences of free trade zones around the world had shown that they at times had become free zones for narcotic trade as well.

I know of good reasons to oppose SAFTA, but the belief that lower import duties will increase the smuggling of illicit goods is not one of them. The experience in other free trade zones has been that increased trade flows provide more shipments within which to hide drugs. But that is an argument against trade flows, not preferential trade agreements.