> What I don't find plausible is the specific kind of harm alleged in the case discussed in the source article, where having videos attuned to your interests constantly fed to you causes you to become depressed and suicidal.
Why couldn't it?
Start with funny videos, like clips of animals doing silly things.
Then have the occasional cringy video of a person being funny but slightly cringe in there, something akin to you've been framed.
Then have people who are being cringe but its carefully framed, a well edited video of some left wing student pushing for a policy but in a clumsy way, being embarrassing the way all teenagers are.
After a while longer, your feed is nothing but clips of BEN SHAPIRO PUBLICALLY EXECUTES THIS SOCIAL JUSTIC WARRIOR ON THE ALTAR OF FACTS AND LOGIC.
BEN SHAPIRO CLIP COMPILATION - OWNS THIS TRANS ACTIVIST- FACTS DON'T CARE ABOUT YOUR FEELINGS!
Then you suddenly are getting people talking about their concerns™ about trans people in sports, how there might be unaddressed issues, and then Helen Joyce and the like are appearing in your feed, sounding calm and reasonable while they politely and civilly discuss how all trans people are inherently vile sexual predators engaged in a global conspiracy to sterilize your children.
More and more right wing content, drip drip drip, absolutely no one step that is that distinguishable from the previous, until eventually your feed is nothing but Q-Anon if you are lucky, and outright Nazism if not.