Originally Posted by
Loren Pechtel
However, there's the issue of ad-hoc networking by Windows. How many "WiFi networks" are really just traveler's laptops--laptops that might very well be in another city tomorrow?
None. Or at least, none that would be used by such a database. It's trivial to tell the difference between an "ad-hoc" network and an infrastructure network, and I'd be 99% certain that anyone mapping AP's would be ignoring ad-hoc networks.
Things like MiFi's and portable APs would be a different story and could certainly lead to mis-leading results, but generally these are going to be very low power compared to fixed networks so I doubt they are too much of a problem.