Comment by DanBC

Modern slaves who are trapped in homes and forced to farm cannabis is a thing in England, so that's probably more common than you think over here.

Here's an article from 2008. http://www.newstatesman.com/law-and-reform/2008/11/cannabis-...

And another from 2015. http://mobile.reuters.com/article/idUSKBN0LU00P20150226