Can Admin identfy users as lurkers without the users knowing? And with the time differences - since were are scattered around the globe - can Admin keep track?
Admin is not like me.
It is IT savvy, so it can find something about the lurker/s.
For example, Admin can get the IP address of any visitor to the site. If Admin knows your IP address as a registered poster, Admin can then identify you as the lurker. Admin doesn not have to do this manually. Admin can write a computer program to do this automatically, and generate a list of site visitors with IP addresses and match it with pregistered members' IP addresses.
For the non-registered lurker, from the IP address, Admin can find the latitude and longitude of the lurker. From that it can find the name of the town and the country.
Of course, if you are visiting through a proxy server, Admin will be stumped.
It helps Admin's ego to know site visitors come from all over the Globe.
So, do not lurk through a proxy server.