My worst imagination is a nefarious entity using our data to determine if we are a threat or try and categorize people for some kind of psyop manipulation.
Something like Captain America Winter Soldier but more realistic. Even things like Cambridge Analytica show it is not that far fetched.
While social media companies and amazon may not have the desire to do those things, they sure make it easier for others by greedily collecting the data.
Oh shit, what was my safe word again? LET ME OUT!