Doesn't matter if his website is a hidden service or not. The communication between the website and the user is done through Tor relays, which are shared. There cannot be any unique ID tied to the user because that would break anonymity.
> Doesn't matter if his website is a hidden service or not.
Well, when it's not a hidden service, it's the exit node that gets to see the contents of the message before sending it (unless it's SSL of course) to the wider Internet. If there was a unique ID within the Tor network, no one on the wider Internet would be able to see it. My thought was that if you were connecting directly to a hidden service within the Tor network, there might be a unique ID. Sounds like even connecting to hidden services within the Tor network is done indirectly.
