I know your question is facetious, but the American constitution did in fact have a provision which protected human trafficking, namely the slave trade.  Article 1 Section 9 of the U.S. constitution prevented Congress from prohibiting the importation of slaves for a period of twenty years, ending in 1807.  The same provision permitted Congress to impose a tax on each imported slave, which I'm sure irritated to no end the good Christians in the U.S. South (aka Trumpland).