[throwaway1105q]

> They already do this through fingerprinting that operates with higher-layer protocols.

It's very hard to distinguish my iPhone and Mac from the other dozens/hundreds people have in my building just through fingerprinting. Very easy if they have separate IP addresses.

Ad link local - cool, I'll look into that, thanks.

[crazygringo]

It's actually very easy just through fingerprinting. You might be surprised.

It doesn't matter if everyone in your building has an iPhone and a Mac as well -- there are things about virtually every single one of them that make them unique.

[oarsinsync]

https://www.amiunique.org/ is scary and eye opening