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Re:Linger – Device to create and broadcast a virtual crowd by shshhdhs on Friday April 28, 2017 @11:44PM (#14224922)
I absolutely love how simple and clever this is, from a security/privacy perspective. The display of the number of folks in your "group" is pure fun. =)

I kind of wish this could be an app. Anyway to replicate the effect on iOS or Android? Or do they not expose the necessary APIs?

Re:Linger – Device to create and broadcast a virtual crowd by javl on Saturday April 29, 2017 @09:35AM (#14226506)
One of the things you'll need is a network card with the ability to go into monitor mode, which allows it to see all traffic instead of only traffic meant for your device. I don't think there are a lot of mobile phones that have such a card (the Nokia N900 did).