>And how is this information different then an IP adress that they also have with each request? Unscrupulous marketers can't do much with your IP address. They

>And how is this information different then an IP adress that they also have with each request? Unscrupulous marketers can't do much with your IP address. They can do a lot more evil with your mobile number: SMS spam, cold calls, re-sell your data, etc, etc...