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Usually there are disclaimers that the user has to accept or that are listed somewhere in the details of the service in question. I suggest that you carefully read over any details pertaining to that particular company's privacy policy. Although some do not SELL your personal information, most that do not provide a symbol of security such as paypal for example, therefore it is the users choice to provide any or all personal data. Although contacting a supervisor is an action that can be taken, keep in mind that there might be a 'loop-hole' that they may attempt to find in order to avoid being held accountable for that which you are accusing them of doing.