You may have come across real (physical) stalking, facebook-stalking, whatever-else-stalking…
Well, now there is also Wiki-stalking. So I am in fact pretty certain who went on the Wiki today for example, in particular, who spent a lot of time there (other than me), etc. How? From the "statistics" tool you can have IP addresses of visitors displayed, with details about location, time of stay, etc., and also "host" which, for Oxford addresses gives away the college. It shouldn't be too hard to identify which ones are Oxford ones (many, if not all, of them start in the same way).
To find out your own IP address go to http://www.ip-adress.com/
Happy stalking!