Well I seem to be in the minority, as I think it's quite interesting to know what the volume of traffic is.

But if I'm editing a response to a post in one Chrome tab, whilst I've got three other threads open in other tabs that I've either read or am about to read ... am I recorded as one visitor or four? And (as others have mentioned) how long does a page sit open befoire it becomes idle?

I'm currently composing a thread simultaneously praising fRoots, Bellowhead, Show Of Hands, Mike Harding's radio programme, and the 1953 definition, just to see if the usage spike is noticeable :)

And +1 for the idea of distinguishing between logged-in users and guests.