I also personally dont like the  documentary and I think by  airing it they just want to show how things are bad in Nepal but they dont realize that almost similar things happeneing in US and elswhere in so called developed countries.

I think most of the Nepalis, if you are not a ignorant, know about the girls trafficking in Nepal, because this type of stories are  published in many Nepali news papers.
The documentary will serve good to those Nepalis which were unware of the situation.
BUt whatever done is done. We cant time travel and stop it. Now we should think how we can benefit from it? One way is as suggested by Neo.
India claims herself as a biggest democracy, developed, blah bhal, but what type of democratic country allowes open human  trafficking ?
Although it is not possible to stop 100%, if Indian governement is serious 70 to 80 % of girl trafficking can be stopped.
What can we do,? We should raise this issue with Indians whenever we have opprtunity. Use social media like face book, asking why India is keeping blind eye on girl trafficking ?
It will create a pressure on Indian government, and some international organization also may want to involve.
otherwise the documentary will be just a shame on us.