Inadequate
Users can turn it on or off and it is easily understandable.
Sounds to me like a clear violation of Advertiser Rights. Clearly, such a dramatic override of advertiser intent should only be permitted by means of a properly registered letter to the advertiser accompanied by a notarized opt-out form and a certified copy of the user's birth certificate as well as legally valid copies of any relevant powers of attorney. A simple browser setting could be faked by the Iranians!!!