scarily... They don't need to to be this creepy, but even I'm a tad baffled by this.
Yesterday me and a few friends were at a pub quiz, of course no phones allowed, so none were used.
It came down to a tie break question of my team and another. "What is the run time of the Lord of the Rings: Fellowship of the ring" according to IMDb.
We answered and went about our day. Today my friend from my team messaged me - top post on his "today feed" is an article published 23 hours ago.....
Forgive the pointless red circle.... I didnt take the screenshot.
My friend isn't a privacy conscience person by any means, but he didnt open IMDb or google anything to do with the franchise and hasn't for many months prior. I'm aware its most likely an incredible coincidence, but when stuff like this happens I can easily understand why many people are convinced everyone's doom brick is listening to them....
Do not forget phones give location/profile data and can easily extrapolate the people you're meeting. It doesn't even need GPS, just need to see which wifi networks are available and compare.
More than listening, it deduces things based on the fingerprints people leave.