I've stickied this thread.
I think Andrew is reminding people that recording your exact location is a bad idea (I would list myself as being in central Lincoln, for example), as is having an unsecured wireless network. I think he's being a little paranoid on the latter point...I'd be more worried about my location being known because of the risk of car theft / someone popping round for "a chat" about a post...except that all my cars are crap and I'm an angel on the forum
cheers
James