> but I am not sure where you would draw it.

I am sure where to draw it: at using machine learning. How did I draw this line? I saw the disparate impact machine learning has vs traditional media, by sheer measurement of friction. Traditional media requires intentionality on the part of the target: picking up a newspaper, turning on a television and tuning to a station. ML on social media exploits key weaknesses in human psychology combined with unprecedented data collection to nudge individuals to read/believe/buy. This is wrong, it’s clearly wrong, and should be illegal.

The sort of slippery-slope arguments are necessary and important but should not paralyze us from taking action against it.