Possibilities that occur to me: Unacknowledged metadata sharing between telcos and google/FB. (This makes a scary amount of sense from the Google/FB point of view, and ditto for the telcos if Google/FB are willing to pay enough). You might not have connected to the internet, but did your laptop? It doesn't even necessarily have to be a full handshake, just ping out an 'I'm here' message. I've generally concluded it's impossible to know what any tool on my PC is doing unless I built it myself (and as I think that's too much like hard work I should be paid for...) Friends' son starts new job as a 'data scientist' next week, can't wait to hear what scarily invasive analysis of daily life he's actually doing.
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Unacknowledged metadata sharing between telcos and google/FB. (This makes a scary amount of sense from the Google/FB point of view, and ditto for the telcos if Google/FB are willing to pay enough).
You might not have connected to the internet, but did your laptop? It doesn't even necessarily have to be a full handshake, just ping out an 'I'm here' message. I've generally concluded it's impossible to know what any tool on my PC is doing unless I built it myself (and as I think that's too much like hard work I should be paid for...)
Friends' son starts new job as a 'data scientist' next week, can't wait to hear what scarily invasive analysis of daily life he's actually doing.