You call others idiots, but you don't even realize the "social contract" is just a name for a particular state of affairs that can arise in societies, not a literal contract. As an anarchist I believe any system of power and coercion that can't justify itself should be dismantled and replaced with something more just. You are not gonna easily convince me that the social contract doctrine cannot be easily justified. You don't sign off to (virtually) anything in a society. Society has norms and also laws. You are born into it and by the time you reach age of consent you don't need to sign anything, your agreement is implicit. So you can either decide to accept them, you can challenge them or you can leave.