While I am not an attorney I do know that an Independent Contractor (IC) Agreement is usually
created just to clarify that you are not an employee for tax/governmental purposes for the client.
Some can be far reaching and over-step the boundaries, but if all they are simply stating is that I am not an employee, but rather and IC, (i.e. responsible for my own taxes, business, I manage myself, where I work, etc.) than I sign them. However I will caution again that I am not an attorney