in reply to Bluetooth people presence detector :)
What's scary is that Bluetooth makes this possible. Imagine the implications. Right now, we take care to clear our cookies once in awhile so that we can't be tracked by websites. But imagine shopping malls, casinos, and so on, tracking bluetooth devices and profiling them. Eventually lcd and plasma billboards could tailor their ads to high rollers as they walk past, for example. Companies could crop up that specialize in maintaining profile databases across multiple businesses. Data munging could deduce that whenever a particular bluetooth address is nearby someone orders a hamburger with extra pickles......
I think Juerd's script is pretty cool. But it did open my eyes a little.