> Stores take measurements about their customers, so do sites. When stores use Bluetooth or other tech to track their customers movement within their stores, t

> Stores take measurements about their customers, so do sites. When stores use Bluetooth or other tech to track their customers movement within their stores, that is also a creepy and unethical. Also "voluntarily" is a complete misnomer as nobody is volunteering for this, a more correct world would be "unwittingly" or possibly "begrudgingly" depending on their level of tech saviness.