And if they could find a way to make you pay attention you’d better believe they’d do it in a heartbeat

When Apple first launched face ID, there was talk (I can't remember where) of developers being excited about the possibility of tracking where their users were looking.

And apple, being not terrible in this one specific regard (their privacy record tends to be decent for a tech giant), didn’t allow it fortunately. Not sure if the same is true on other phones.