Sorry to drag this discussion on, but we are currently seeing a marvellous flow of aircraft between Portugal and the Canaries, and showing aircraft on the ground at Madeira.
I guess therfore that there is currently a box at Madeira, but the Network map doesn't show any boxes anywhere near - I suppose the owner's ISP is in Portugal and his pin is there (?).
I'd really like to see the pins at least close to where the box actually is (OK - with the owner's specific ticking of a Preferences option).
EDIT - two minutes after I posted this, the Madeira box was switched off - typical!
Rod