[Atlas Sneezed]

"Surfing leaves footprints."

The only identifying footprints it leaves are on the machine of the surfer (unless they provide more personal information.)

[triggerhappy]

Not true. All web servers log requests made by surfers. Normally included in the log files would be the IP address of the machine making the request ( loading web page).

Armed with the IP address you could then determine the ISP which "owns" the IP and potentially the user at the time of the request.