address harvesting analysis idea

While sitting here watching bad TV, I had a thought(tm). Has anyone set-up a generic web-page, not linked from anywhere useful, which autogenerates a "contact e-mail" address (like deadbeef@example.com) and logs which IP reads what address (even using the remote IP as the username to provide) and then waits for the address to be used for SPAM ? Is there any use in doing this (to try to identify who is harvesting) ? Maybe I should go and eat some food, cool my head down. Peter