Chicago, IL, Apr. 20 (UPI) -- Would anyone willingly download a file from the Internet that can track his or her movements online and provide that private information to advertisers? Willing or not, experts told UPI's The Web chances are most Internet users already harbor many "cookies," or small data files, on their computer hard drives, giving marketers a glimpse of what they buy online, where they buy it and how much they spend. "Cookies are a hot issue right now," said Ann Westerheim, president of Ekaru, an IT security consulting firm in the Boston area. "People have heard of cookies, but they are probably not aware of the fact that the files are being written to their hard disk." By Gene Koprowski