Although proponents of free trade agreements emphasize their ability to improve economic efficiency, some agreements can create complex webs of regulations that actually hurt businesses. The problem is that each bilateral trade deal includes multiple regulations defining products, tax rates, points of origin and other aspects of trade. The dozens of different bilateral deals in the world create legal complexities for buyers and sellers. For example, where does a T-shirt made in Vietnam with cotton grown in the United States come from? Under one agreement, the answer might be Vietnam, while another would call the shirt American. Some economists call these tangled webs or regulations the free trade "noodle bowl" and argue that bilateral agreements do more harm than good.
Read more : http://www.ehow.com/list_6113059_disadvantages-trade-agreements.html